Forcepoint DLP Deployment Guide

Deployment Guide
Forcepoint DLP
v8 .9 .x
©2022 Forcepoint
Forcepoint and the FORCEPOINT logo are trademarks of Forcepoint. Raytheon is a registered trademark of Raytheon
Company. All other trademarks used in this document are the property of their respective owners.
Published 2022
Every effort has been made to ensure the accuracy of this document. However, Forcepoint makes no warranties with respect
to this documentation and disclaims any implied warranties of merchantability and fitness for a particular purpose.
Forcepoint shall not be liable for any error or for incidental or consequential damages in connection with the furnishing,
performance, or use of this manual or the examples herein. The information in this documentation is subject to change
without notice.
Last modified 31-Mar-2022
Contents
Chapter 1
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Deployment options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System requirements for Forcepoint DLP components . . . . . . . . . . . . . . . . . . . . . 4
What is the protector?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2
Planning Forcepoint DLP Deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Deciding what data to protect. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Determining where confidential data resides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Determining information flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Defining the business owners for the data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Deciding who will manage incidents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Planning access control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Analyzing network structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Planning network resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Most common deployments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Forcepoint DLP with Forcepoint DLP Endpoint . . . . . . . . . . . . . . . . . . . . . . 15
Forcepoint DLP protector with ICAP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Forcepoint DLP Network with Web Content Gateway . . . . . . . . . . . . . . . . . 16
Forcepoint Data Discover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Planning a phased approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Chapter 3
Integrating with Existing Infrastructure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Working with existing email infrastructure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Pre-installation checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Working with web proxies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Working with Exchange servers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Chapter 4
Scaling Forcepoint DLP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
When does the system need to grow?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Adding modules to the deployment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Forcepoint DLP Deployment Guide i
Contents
ii Forcepoint DLP
1
Overview
Forcepoint DLP can protect organizations from information leaks and data loss at the
perimeter and inside the organization, as well as in certain Infrastructure as a Service
(IaaS) platforms.
●
Forcepoint Data Discovery can be used to learn the location of sensitive data both
on-premises an in supported cloud-based applications. It can be used to scan data
on file servers, email servers, and databases, as well as in content collaboration
applications, such as Microsoft SharePoint and Box.
●
Forcepoint DLP Network can be used to prevent data loss through email and over
web channels (HTTP, HTTPS and FTP). It supports the scanning of content
supplied by third-party solutions, such as Citrix FileShare, via the ICAP protocol.
●
With Forcepoint DLP Endpoint, an endpoint agent can be used to prevent data
loss over endpoint channels such as removable storage devices, mobile devices,
browser uploads, and email clients and applications (such as IM and file share
clients). It can also discover and remediate sensitive data stored on laptop and
desktop systems. The endpoint agent lets administrators analyze content within a
user’s working environment and block or monitor policy breaches as defined by
the endpoint profiles.
The basic components of Forcepoint DLP solutions are:
●
Management server
The management server hosts both the Forcepoint Security Manager (the
graphical interface used to manage Forcepoint DLP and other Forcepoint security
solutions) and core Forcepoint DLP components. It also acts as the primary
Forcepoint DLP server.
Although there is only one management server, additional Forcepoint DLP servers
may be deployed for load balancing.
●
Protector (requires a Forcepoint DLP Network subscription)
The protector intercepts and analyzes traffic on SMTP, HTTP(S), and FTP
channels, among others. It also supports DLP content scanning with third-party
proxies and data sharing solutions via ICAP.
See What is the protector?, page 4.
●
Agents
A variety of agents extend Forcepoint DLP functionality to work with cloud
applications (CASB service) and so on.
Forcepoint DLP Deployment Guide  1
Overview
●
Endpoint clients
Endpoint client software runs on end user desktop and laptop machines
Deployment options
A basic deployment might have just one management server and an analytics server.
To extend enforcement capabilities, it might add a protector.
The high-level illustration shows a basic deployment ideal for a smaller- to mediumsized organization with a single Internet egress point. (The illustration is intended to
show the general distribution of components and does not include network details,
such as segmenting, internal firewalls, routing, switching, and so forth.)
●
The analytics server is used for Incident Risk Ranking reports.
●
The protector can protect several channels, including SMTP, HTTP, FTP, and
ICAP.
The servers can be configured to either monitor or monitor and protect sensitive data.
2  Forcepoint DLP
Overview
The following illustration is a high-level diagram of a larger Forcepoint DLP
deployment:
This shows the extended capabilities of Forcepoint DLP incorporated into a more
complex network environment. It includes an extra Forcepoint DLP server and several
additional agents to support larger transaction volumes and numbers of users. Very
large deployments can have multiple Forcepoint DLP servers and protectors.
For diagrams of the most common customer deployments, see Most common
deployments, page 14.
DLP deployment in a public cloud environment
Several options are available for deploying Forcepoint DLP in a public cloud
environment. Supported public cloud infrastructure vendors are Microsoft Azure and
Amazon AWS. Deployment options include:
●
Full deployment, in which the management server, DLP Supplementary servers,
and agents all reside in an Azure or AWS environment.
When implementing a full deployment in Azure or AWS, all cloud-based virtual
machines (VMs) must be connected to a virtual network so that they can
communicate with one another. The appropriate firewall ports must be configured
for inbound and outbound traffic. These are the same ports as for on-premises
installations; see System requirements for more information. Ports 80 and 443
must be open for external communication. Static IPs must be used.
●
Hybrid deployment, in which the management server resides on-premises and
connects with agents in Azure or AWS via a site-to-site VPN.
Forcepoint DLP Deployment Guide  3
Overview
When implementing a hybrid deployment in Azure or AWS, a site-to-site VPN is
required for communication between the on-premises management server and the
agents in the cloud. Static IPs must be used.
Refer to the Forcepoint DLP Installation Guide for instructions on installing
Forcepoint DLP in AWS.
Refer to the following resources for general information on public cloud deployment:
●
Microsoft Azure documentation
●
Amazon AWS documentation
System requirements for Forcepoint DLP components
In preparation for deployment, the system requirements for all Forcepoint DLP
components can be found in the Deployment & Installation Center.
●
For operating system, hardware, and virtualization (VM) requirements, see
System requirements for this version.
●
For port requirements, see Forcepoint DLP ports (the “Forcepoint management
server” section).
What is the protector?
The protector is a component of Forcepoint DLP that can monitor and report on web
traffic and act as an MTA to monitor, block, quarantine, and encrypt email traffic.
For enforcement over the HTTP/S channel, the protector can integrate with a thirdparty proxy that supports ICAP. (As an alternative, use the Web Content Gateway.)
The protector is additionally available as a software package and can be installed on
supported CentOS Linux 7.x and RedHat 7.x servers within public cloud services. A
site-to-site VPN is required when deploying the software protector in a public cloud
environment.
Refer to the following resource for public cloud deployment:
●
Use the portal to attach a data disk to a Linux VM (Azure)
When to use the protector
The protector works in tandem with a Forcepoint DLP server.
●
The Forcepoint DLP server provides advanced analysis capabilities, while the
protector intercepts network traffic and either monitors or blocks it, depending on
the channel.
4  Forcepoint DLP
Overview
●
The protector supports analysis of SMTP, HTTP/S, FTP, and plain text. It can
monitor or block email traffic, but only monitor web traffic. Blocking web traffic
requires integration with a third-party proxy that supports ICAP.
The protector fits into the network with minimal configuration. It requires no network
infrastructure changes.
The protector is the best choice for monitoring SMTP traffic. Just connect the
protector to a SPAN or mirror port that reflects the SMTP traffic.
For email blocking capabilities, use the protector’s explicit MTA mode.
To monitor HTTP traffic, either use the protector or integrate Forcepoint DLP with
another web proxy.
To monitor FTP or plain text, use the protector. Note that the protector cannot block
traffic on these channels. Optionally, integrate with another web proxy that buffers
FTP and supports ICAP.
Deploying the protector
Protectors can be used in monitoring mode for data loss detection. When deployed in
this manner, they do not interfere with network traffic, but they also cannot prevent
(block) data loss—only note and report losses that occur.
For each data loss detection channel, the protector can be deployed to use the
following modes:
Service
Function
HTTP
Monitoring
SMTP
Monitoring passive
Mail Transfer Agent (MTA)
All Others
Monitoring
ICAP
Monitoring
Blocking
Forcepoint DLP Deployment Guide  5
Overview
In monitoring mode, the protector is connected off the network via the SPAN/mirror
port of a switch (or via a network TAP), as shown in the following diagram. This
allows the protector to monitor and analyze traffic, but not block it.
The protector must connect both to the SPAN/mirror port or TAP, and the Forcepoint
DLP management server.
For additional diagrams showing typical protector deployments, see Forcepoint DLP
protector with ICAP, page 16, and Planning a phased approach, page 19.
6  Forcepoint DLP
2
Planning Forcepoint DLP
Deployment
Before installing Forcepoint DLP, analyze the existing resources to make a
comprehensive security plan, using the following steps:
1. Deciding what data to protect, page 7
2. Determining where confidential data resides, page 9
3. Determining information flow, page 10
4. Defining the business owners for the data, page 10
5. Deciding who will manage incidents, page 10
6. Planning access control, page 10
7. Analyzing network structure, page 11
8. Planning network resources, page 12
9. Planning a phased approach, page 19
Deciding what data to protect
What data does the organization need to protect? What data privacy laws, regulations,
and compliance concerns and obligations does the organization have?
Consider the factors described below to define the scope of what needs to be
protected.
Geographical factors
●
Each region may have its own regulations or laws that require protecting various
types of sensitive information, such as personal, financial, and medical data.
●
Global enterprises may be bound to multiple laws if they have branch offices in
different regions. (For example, they may have to abide by different state laws if
they have offices in several different states)
Industry
●
Each type of industry may have its own laws and regulations. For example:
■
GLBA for Finance and Banking
Forcepoint DLP Deployment Guide  7
Planning Forcepoint DLP Deployment
■
HIPAA for Healthcare and Pharma
●
Organizations that develop new technologies may need to protect intellectual
property and trade secrets (such as designs, software code, drawings, or patent
applications).
●
Government agencies and organizations that are affiliated with the government
are subject to special requirements and regulations, such as DIACAP for units and
contractors related to the U.S. Department of Defense and FISMA for U.S. federal
agencies and their contractors.
●
For public companies, additional regulations may apply (such as the SarbanesOxley Act in the U.S., or regulations that are published by the regulatory body of
the relevant stock markets).
●
Marketing data, like the following, may need to be kept secret from competitors:
Sector
General
■
Upcoming press releases
■
Marketing campaigns
■
Leads
■
Customer contact information and other customer data
Many organizations have individualized needs for data protection. Though these
might remain outside typical categories, Forcepoint DLP can accommodate them.
The Forcepoint DLP first-time policy wizard assists administrators in defining the
organization’s region or regions and industry. It then displays relevant policies,
making it easier to select them for monitoring and enforcement.
The policy wizard launches automatically when a Forcepoint DLP administrator logs
on to the Forcepoint Security Manager after installation or upgrade.
After selecting the appropriate predefined policies, administrators can create policies
to protect specific information or types of information, such as:
●
Designs
●
Drawings
●
Marketing materials
●
Legal documents
●
Strategic planning documents, such as business plans
●
Financial and pricing information
●
All documents marked “Confidential”
8  Forcepoint DLP
Planning Forcepoint DLP Deployment
Determining where confidential data resides
Based on experience from numerous Forcepoint DLP deployments, it appears that
most sensitive company information resides in:
●
Corporate file servers and shared drives
●
In-house databases
●
Personal laptops, workstations, and removable media
Corporate file servers and shared drives
To determine where confidential information is stored:
●
Ask: Talk to appropriate data owners within the organization to find relevant file
servers and data stores.
This can uncover a large portion of the data that needs to be protected. Reviewing
the locations that result from this process will likely reveal other critical data
branchings and parallel storage places.
●
Discover: Define policies for data discovery, then use Forcepoint DLP to classify
file servers, shared drives, and endpoints. This helps identify where data is located
in the network.
Combining the results can provide a good idea of the location of the organization’s
confidential information.
In-house databases
To understand which databases are critical:
●
Ask:
■
Talk to people that manage in-house applications that rely on internal
databases (such as customer relations, order processing, and accounting).
■
Talk to database administrators to identify the most-accessed databases. The
more a database is accessed, the more chances there are for data loss.
The IT department may be able to elaborate on the results of talking to both of
these groups.
●
Discover: Define policies for database discovery, then use Forcepoint DLP to
classify databases. This should let you know primarily where your vital records
are located.
Combining the results can narrow down the most critical database servers, databases,
and tables to protect.
Forcepoint DLP Deployment Guide  9
Planning Forcepoint DLP Deployment
Determining information flow
Analyze the flow of information through the organization:
●
Where is information typically coming from? Internal users? Partners? Vendors?
●
Where does information need to be sent?
●
What are the potential pathways for information?
●
What processes are in place, if any, to govern data flow?
●
How many HTTP, SMTP, and FTP exits or egress points are there in the
organization?
These questions are vital to ensuring that Forcepoint DLP protectors are placed
appropriately so that nothing escapes analysis.
Defining the business owners for the data
The business owners of information normally come from the departments where the
information was created.
For example, for marketing materials, the head of marketing is normally the business
owner. That person should be consulted about Forcepoint DLP deployments that
protect marketing data.
Normally, principals from affected departments want to get notifications about data
losses containing information originating from their department (even and especially
if the sender is from a different department).
Deciding who will manage incidents
How should incident management be delegated across the organization?
Identify who is responsible for data management in various departments. If this is
unclear, consult with the department manager or train a trusted individual from that
department.
Once incident managers are identified within the organization, they can be assigned
appropriate roles and permissions in the Forcepoint Security Manager.
Planning access control
Most networks provide access control (preventing personnel from viewing
unauthorized files) by giving each user a login name and password, and authorizing
each user to view only the network applications and content that the user requires.
10  Forcepoint DLP
Planning Forcepoint DLP Deployment
Authorized users, however, can still send content they are authorized to use to
unauthorized recipients.
Forcepoint DLP augments access control by providing Information Distribution
Management (IDM) capabilities, thereby greatly enhancing the level of information
security. Forcepoint DLP protects digital content from being sent from within the
network to external recipients, as well as protecting classified information from being
sent to unauthorized users within the local network.
To make the most of data security capabilities, delineate users as belonging to groups
or security levels, enabling a sophisticated, high level of control over classified data.
Naturally, when considering the policies discussed here, it is important to consider
how these policies are impacted by or impact other content policies within the
organization.
Analyzing network structure
To best employ Forcepoint DLP:
●
Analyze your network structure.
●
Determine the location of confidential information.
●
Note which documents need to be protected and where they are located.
●
Determine whether changes to the network directory structure are needed to group
documents differently for security purposes.
In most organizations, user rights have been determined and built into the network
directory structure. The existing configuration may be fine as it is. On the other hand,
internal network definitions may need to change to accommodate current, higher
security needs.
Structural guidelines
It is possible to configure the system so that a particular user cannot access specified
documents through the network, but can receive them by email. For example, a
manager would not want employees to access documents in his or her personal folder,
but would want to be able to send the documents to them by email. It is therefore
important to perform this analysis with a network administrator, so that changes are
implemented in a smooth, logical fashion.
Typically, network directories are organized functionally, according to the different
business units in the company. Within this structure, functional groups are usually
entitled to look at documents within their business unit.
The recommended process is:
●
Take a network map of all the directories, and look at how the network access is
organized.
Forcepoint DLP Deployment Guide  11
Planning Forcepoint DLP Deployment
●
Determine what types of classified documents the organization has, and where
they are located.
●
Determine whether documents of similar confidentiality are together in similar
directories.
■
Organize/group information that is critical to the organization and information
whose security is legally mandated.
For example, financial institutions may start by considering customer data
(such as Social Security numbers or account numbers) and highly confidential
business information.
■
Organize/group important proprietary and confidential information with
medium or low change-frequency
■
Arrange all major information assets so that data locations, relationships, and
security-value hierarchies are well understood.
The result of this analysis should be a table identifying the directories in the network
that need to be protected, indicating what types of users should be able to receive
those files. This should provide insight into access issues.
It may be desirable to rearrange some areas of network access, and set the data
security accordingly. See below for recommended procedures.
Planning network resources
To decide on factors like disk space allocation, number of servers, and network
distribution, start by answering these questions:
●
What volume of daily data is expected in number of transactions?
●
What is the user count?
●
Are geographically distributed offices being covered?
●
What is the user directory structure (Active Directory, Domino), and what are the
IP addresses of the LDAP servers?
●
Which ports and port numbers are used?
Allocating disk space
Forcepoint DLP allocates a default amount of disk space for archiving fingerprint and
forensic repositories. Administrators can modify the allocation. The tables below
indicate the default and maximum disk space for archives, the forensics repository,
endpoint client incidents, log files, and fingerprint storage.
Modify disk space settings after installation using the Forcepoint Security Manager.
Instructions can be found in the Forcepoint DLP Administrator Help.
12  Forcepoint DLP
Planning Forcepoint DLP Deployment
On the management server
Type
Description
Default
Maximum
Archive
The disk space of the incident
archive folder on a local or
external partition.
50 GB
Remote: None
Local: 50 GB
Forensic
repository
The disk space of the forensic
records stored in the forensics
repository folder.
50 GB (network)
20 GB (mobile)
None
On endpoint client
Type
Description
Default
Setting
Max Disk
Space
Endpoint
client incident
storage
The disk space that each endpoint
client should allocate for incident
storage when the endpoint host is
disconnected from the Management
Server.
100 MB
100 MB
Endpoint
client log file
The disk space of the log file viewed
on the endpoint client.
16 MB
100 MB
Endpoint
client
PreciseID
fingerprint
storage
The disk space that each endpoint
client should allocate for storing
directory and SharePoint
fingerprints.
50 MB
1,000 MB
Distributing resources
Forcepoint DLP supports multi-site, distributed deployments. Among other examples:
●
In addition to the management server, there can be one or more supplemental
Forcepoint DLP servers to balance the load.
●
The Web Content Gateway includes its own local policy engine to supplement the
policy engine on other servers.
●
It is possible to have distributed (primary and secondary) fingerprint repositories.
●
The crawlers on the Forcepoint DLP servers can be used for fingerprint and
discovery scans, or standalone instances of the crawler agent can be added to
improve performance.
Network architecture and geographical factors of the organization contribute to
determining the best way to distribute Forcepoint DLP resources.
See Most common deployments, page 14, for examples.
Forcepoint DLP Deployment Guide  13
Planning Forcepoint DLP Deployment
Load balancing
Load balancing allows administrators to configure how each Forcepoint DLP module
sends its data to specified policy engines for analysis. This both distributes the load
and, more importantly, ensures that the organization’s email and HTTP performance
are never harmed.
For example, designate 1–2 dedicated servers to analyze HTTP traffic (where analysis
latency is critical), and use another set of servers to analyze other channels.
An agent or a protector service can have its traffic analyzed by all listed policy
engines, or by specifically selected policy engines. (Protector traffic can be analyzed
only by local or Windows-based policy engines.) Administrators can specify which
policy engine analyzes a specific agent or service of the protector.
Note
Forcepoint recommends that you do not distribute the load
to the management server.
Load balancing is configured in the Data Security module of the Security Manager.
See the Forcepoint DLP Administrator Help for instructions.
Most common deployments
Forcepoint DLP is a flexible solution that affords various, customizable deployment
scenarios. Be sure to obtain guidance from a Forcepoint Sales representative to find
the best deployment option for your organization.
14  Forcepoint DLP
Planning Forcepoint DLP Deployment
Forcepoint DLP with Forcepoint DLP Endpoint
Forcepoint DLP Endpoint offers:
●
Local discovery
●
Removable media & CD/DVD security
●
Application controls for copy/paste, print, print screen, file access
●
Endpoint Web channels (HTTP/HTTPS)
●
Endpoint LAN control
●
Endpoint email
●
Endpoint printing
Small Organization
Large Enterprise
● 1 management server
● Endpoint clients
● 1 management server
● 1 Forcepoint DLP Server for every
15,000 endpoint clients
Forcepoint DLP Deployment Guide  15
Planning Forcepoint DLP Deployment
Forcepoint DLP protector with ICAP
Forcepoint DLP Network with Web Content Gateway
The Forcepoint DLP Network includes the following forms of data protection:
●
SMTP blocking
●
HTTP blocking via built-in Content Gateway
●
Cloud email inspection
●
Policy enforcement for all channels
●
Destination policy controls
16  Forcepoint DLP
Planning Forcepoint DLP Deployment
It also includes data monitoring for:
●
Mail
●
Web / FTP
Forcepoint DLP Network also includes support for:
●
User-defined protocols
●
Destination awareness
Small Organization
Large Enterprise
● 1 management server
● 1 protector
● 1 management server
● Multiple Forcepoint DLP Servers
● Multiple protectors
Forcepoint DLP Deployment Guide  17
Planning Forcepoint DLP Deployment
Forcepoint Data Discover
Forcepoint Data Discover offers network and file discovery for data in file folders,
SharePoint sites, databases, and Exchange servers. It also includes automated
remediation for data at rest (for example, to remove the data from inappropriate
network locations).
Small organization
Large org/Enterprise
● 1 management server
● 1 Forcepoint DLP
Server
● 1 management server
● Multiple Forcepoint DLP servers with
discovery and fingerprinting crawlers.
Forcepoint Technical Support can help to
assess the number of servers needed.
18  Forcepoint DLP
Planning Forcepoint DLP Deployment
Planning a phased approach
As part of the planning process, consider the tactics that can be employed in protecting
data, configuring policies, managing incidents, and controlling access.
To assess how to protect data from compromise, Forcepoint recommends a multiphased approach. One possible approach is outlined here.
Phase 1: Monitoring
Start by monitoring data (auditing without blocking):
1. Enable regulatory compliance, regional, and industry-related predefined policies
in order to:
■
Deploy solid, first stage DLP.
■
Get a good picture of what information is being sent out, by whom, to where,
and via which methods.
2. If the organization has unique data identification needs that are not covered by a
predefined policy, request custom policies from Forcepoint.
■
Data types requiring a custom policy might be items like coupons or catalog
numbers.
■
To request a policy, contact Forcepoint Technical Support. They will escalate
the request and engage a research team. The usual turnaround is
approximately 3 weeks. (The research team can typically provide an
estimated time to completion within 3 days of reviewing the request).
3. Fingerprint data (can be also part of Phase 2):
■
Data fingerprinting allows accurate and efficient data identification
■
Database fingerprinting (PreciseID database technology) allows accurate and
efficient detection of fingerprinted records coming from database tables,
database views, and CSV files.
■
Content policies can be flexibly defined for data sources, with detection rules
based on combinations of columns and thresholds based on number of
matches.
■
Database fingerprinting can be used in conjunction with PreciseID patterns.
While patterns identify a full range of data (for example, all credit cards),
database fingerprinting can narrow down the detection only to credit cards
belonging to the organization’s customers.
■
Files, directory, and SharePoint fingerprinting (PreciseID files technology)
allow identification of unstructured data (free text).
○
○
Data can be identified in different formats (e.g., after PDF conversion),
different contexts (excerpt of fingerprinted confidential document), and so
on.
Advanced and efficient algorithms allow detecting fingerprints even on
endpoints that have limited resources.
Forcepoint DLP Deployment Guide  19
Planning Forcepoint DLP Deployment
Phase 2: Monitoring with notifications
In the second stage, enable email notifications to relevant members of the organization
when a policy breach is discovered. The options are:
●
Global security administrator
●
Data owners (specified for each policy)
●
Senders (people that actually leak the information)—some enterprises prefer to
use this option to educate users and watch the expected decrease in the amount of
incidents over time in the Trends report.
●
Managers—direct managers of people that leak information (based on data in the
directory server).
Phase 3: Policy tuning
In this phase, provide tuning to keep the incident volume manageable, and to ensure
that only relevant incidents are being reported.
This phase can operate in parallel to Phases 1 and 2.
●
Disable policies that are not showing value.
●
Make sure the channels selected for policy application are relevant.
●
Identify incidents that are authorized transactions and make appropriate changes
in the authorization for specific policies (e.g., allowing sending specific
information from certain sources to certain destinations).
●
Change thresholds to avoid too many incidents from some policies.
Also use Phase 3 to make sure that proper incident managers are assigned for various
types of incidents. Create policy category groups in the Data Security module of the
Security Manager and assign them to relevant incident managers.
Phase 4: Enforcing
Begin this phase after all policies have been successfully tuned and business owners,
data owners, and incident managers are trained and ready to handle the incidents.
●
Start with the one channel (for example, SMTP), then gradually move to add
enforcement for other channels (like HTTP).
●
Continue monitoring incidents to identify whether certain policies should be
moved back to auditing only. For example, if all quarantined email is released, it
might be better to simply monitor the transactions.
●
It may be desirable to integrate with encryption gateways as part of SMTP
enforcement. Forcepoint DLP can automatically route certain email transactions
to be encrypted based on email content and/or policy definitions (actions).
20  Forcepoint DLP
Planning Forcepoint DLP Deployment
Phase 5: Discovery
This phase can start earlier, in parallel with other phases.
Establish discovery tasks on sensitive corporate servers, databases, Exchange servers,
and SharePoint sites that are widely accessed. This ensures that administrators know
where sensitive information is located, and who is allowed to access it.
Phase 6: Endpoint deployments
This phase can also be instituted earlier in the security process.
Deploy Forcepoint DLP Endpoint to control data in use (removable media, clipboard
operations, file access):
●
The endpoint software can control data in use, even if users are disconnected from
network.
●
The endpoint software can optionally be installed in stealth (invisible) mode.
Local discovery investigates the drives on a local machine, like a laptop, which can be
disconnected from the network. This can help to uncover sensitive files that network
discovery doesn’t reach.
Forcepoint DLP Deployment Guide  21
Planning Forcepoint DLP Deployment
22  Forcepoint DLP
3
Integrating with Existing
Infrastructure
Forcepoint DLP is an integral piece of the network architecture, and can be combined
with existing systems to ensure seamless web and email protection. This section
describes:
●
Working with existing email infrastructure, page 23
●
Working with web proxies, page 25
●
Working with Exchange servers, page 29
Working with existing email infrastructure
Configure Forcepoint DLP to work with an existing email infrastructure to block and
quarantine email that contravenes DLP policies.
This can be done by connecting the Forcepoint DLP protector to the network directly
in the path of the traffic, enabling traffic to be not only monitored, but also blocked,
quarantined, or even terminated before it reaches its destination.
The protector has 2 SMTP modes:
●
Monitoring mode (sometimes referred to as passive mode)
In this mode, the protector monitors and analyzes SMTP traffic, but does not
block transactions.
●
Explicit Mail Transfer Agent (MTA) mode
In this mode, the protector acts as an MTA for SMTP traffic and operates in
protect mode. Protect mode allows transactions the breach policy to be blocked or
quarantined. Limit the networks with permission to send email via the protector’s
SMTP service to prevent the protector from being used as a mail relay.
Forcepoint DLP Deployment Guide  23
Integrating with Existing Infrastructure
Pre-installation checklist
The figure below shows a common topology in which the protector is installed inline.
The checklist refers to the numbers in this figure.
Before installation:

Verify that the required hardware is available. Check the Deployment &
Installation Center for the list of certified hardware.
Have valid IP addresses for the Forcepoint DLP server and the protector
management port
Make sure the following IP addresses are known prior to installation. They are
required in order to complete the procedure:


■
24  Forcepoint DLP
The complete list of internal networks (IP ranges and subnet masks) [1]
Integrating with Existing Infrastructure
If there is more than one site, the internal networks list should include the
networks of all sites.
■
A list of the mail server’s IP addresses (in all sites) [4] [6]
■
The IP addresses of the mail relay, if one exists [5] [7]
■
The IP address of the outbound gateway for the protector (this will typically
be the internal leg of the firewall) [2]
■
The IP address of the inbound gateway for the protector (this will typically be
the external leg of the backbone switch or router) [6]
■
The HELO string the protector will use when identifying itself. This is
relevant for the SMTP channel only.
■
If customized notifications will be displayed when content is blocked, these
should be prepared beforehand.
Working with web proxies
The recommend web proxy for use with Forcepoint DLP is Content Gateway. Content
Gateway includes its own Forcepoint DLP policy engine and streamlines
communication with the management server.
Content Gateway is included with Forcepoint DLP Network and Forcepoint Web
Security.
Forcepoint DLP also supports the following third-party Web proxies:
●
Blue Coat (Blue Coat web proxy, page 25)
●
Squid open source (Squid open source Web proxy, page 28)
These proxies integrate with Forcepoint DLP over ICAP, an industry-standard
protocol designed for off-loading specialized tasks from proxies.
Blue Coat web proxy
Blue Coat provides protocol support for HTTP, HTTPS, and FTP.
This section describes the recommended integration solution. Other configurations
can be implemented, but should be tested prior to deployment.
Limitations
●
The solution does not support the FTP GET method for request modification.
●
The solution does not support the HTTP GET method for request modification.
●
The solution can only scan files 12 MB or smaller. The system can generate an
error if a file exceeds that size.
●
The described deployment does not include caching (Blue Coat SG does not cache
PUTs and POSTs). Nonetheless, exercise care if a response mode configuration is
used.
Forcepoint DLP Deployment Guide  25
Integrating with Existing Infrastructure
Deployment
This deployment recommendation describes a forward proxy: a Blue Coat SG
appliance connected to a Forcepoint protector using ICAP. The Blue Coat SG
appliance serves as a proxy for all HTTP, HTTPS, and FTP transactions. It is
configured with rules that route data to the Forcepoint ICAP server.
The Forcepoint protector receives all traffic directed to it from the Blue Coat
appliance for scanning,
The following diagram outlines the recommended deployment:
The deployment solution can be used in either monitoring or enforcement mode.
●
In enforcement mode, the Blue Coat SG appliance requires Forcepoint DLP to
authorize each transaction before allowing files to be posted or uploaded to their
26  Forcepoint DLP
Integrating with Existing Infrastructure
intended destination. This is the recommended mode, because it provides the most
security.
●
In monitoring mode, the transactions that are redirected by the Blue Coat SG
appliance are analyzed by Forcepoint DLP, which can then generate incidents for
confidential information and send notifications to administrators and information
owners. In this mode, the Forcepoint DLP ICAP server universally responds to all
redirected transactions with Allow.
Forcepoint DLP Deployment Guide  27
Integrating with Existing Infrastructure
Network integration
The solution includes of 3 components:
●
Forcepoint DLP protector
●
Forcepoint management server
●
Blue Coat SG appliance
The ICAP integration component resides on the protector, and acts as a relay between
the Blue Coat SG appliances and the management server as shown below:
Configuring the Blue Coat integration
●
Refer to the Forcepoint DLP Installation Guide for instructions on installing
Forcepoint DLP.
●
Refer to the Blue Coat documentation for Blue Coat appliance installation
instructions.
●
After installation, see the Getting Started Guide for configuration instructions.
Squid open source Web proxy
Squid provides protocol support for HTTP, HTTPS, and FTP. It integrates with
Forcepoint DLP over ICAP, which is supported in Squid-3.0 and later.
Deployment
The recommended deployment uses a forward proxy: a Squid web proxy server
connected to a Forcepoint protector using ICAP. Squid serves as a proxy for all HTTP,
HTTPS, and FTP transactions. It is configured with rules that route data to the
Forcepoint ICAP server.
28  Forcepoint DLP
Integrating with Existing Infrastructure
The Forcepoint DLP protector receives all traffic directed to it from the Squid server
for scanning, and, in enforcement mode, returns a response indicating whether to
block or allow the transaction. In monitoring mode, the response is always allow.
System setup
Refer to the Forcepoint DLP Installation Guide for instructions on installing
Forcepoint DLP, and refer to the relevant Squid documentation for more information
on installing the Squid Web proxy.
After connecting the systems, follow instructions to configure network parameters and
other properties.
Working with Exchange servers
With Forcepoint DLP, you can perform discovery on Microsoft Exchange servers.
Before you begin, there are a number of steps you need to take.
Exchange Online 365
1. Create or identify an Exchange 365 account for Exchange discovery scanning.
2. Grant the account one of the following roles. This is necessary so that the system
can discover messages and display results.
○ Organization Management
○ View Only Organization Management
The service account should now be able to access Exchange via Outlook Web App
(OWA) and move between the mailboxes intended to be scanned during the
Forcepoint DLP Deployment Guide  29
Integrating with Existing Infrastructure
discovery. Log onto OWA with this account and try switching between mailboxes
as shown below:
3.
Configure Exchange impersonation. Exchange impersonation needs to be
enabled for the service account used for the discovery
a. Log into the Microsoft Exchange admin center; for example, https://<server
name>/IP/ecp/
b. Click permissions, then admin roles.
c. Under Name, double-click Discovery Management.
d. Under Roles, click the plus sign and add a new role named
“ApplicationImpersonation” to the Roles table.
30  Forcepoint DLP
Integrating with Existing Infrastructure
e. Under Members, click the plus sign and add the Service Account you will be
using in the Exchange discovery task, such as Administrator, to the Members
table.
4. Configure an Exchange discovery task.
a. Log onto the Forcepoint Security Manager and select the Data module.
b. Select Main > Policy Management > Discovery Policies > Add Network
Task > Exchange Task.
c. Complete the wizard as explained in the Forcepoint DLP Administrator
Help. On the Exchange Servers page, enter the credentials you used in step 1
and 3.
5. Check that Integrated Windows authentication is turned on (it should be on by
default). If it is not:
a. In the Exchange admin center, go to servers > virtual directories > EWS
(Default Web Site).
Forcepoint DLP Deployment Guide  31
Integrating with Existing Infrastructure
b. Select Integrated Windows authentication.
32  Forcepoint DLP
4
Scaling Forcepoint DLP
As the organization’s network and network security needs grow, Forcepoint DLP can
grow with it. The software is architected for scalability, even for networks with
massive traffic and complex topologies.
The sections below address network growth issues such as:
●
Recognizing when the system load demands system expansion.
●
Configuring for single and multi-site deployments.
●
Dealing with the growth of the various information repositories.
See:
●
When does the system need to grow?, page 33
●
Adding modules to the deployment, page 36
When does the system need to grow?
There are numerous triggers that might prompt an organization to expand the
Forcepoint DLP system. Among them:
●
Performance issues
Performance issues may vary in visibility and impact.
■
Slow discovery or fingerprinting scans, for example, could indicate an
overworked crawler. This might be resolved by adding a crawler or
Forcepoint DLP server.
■
If users are experiencing slow web or email transactions, an additional policy
engine might help.
Even if performance issues are not obvious, system resources may not be fully
optimized.
To see how the Forcepoint DLP system is performing, open the Security Manager
and go to the Main > Status > System Health page. Expand each module to see
load statistics, the number of transactions, latency information, and more.
Before adding modules, try balancing the load between existing Forcepoint DLP
servers (policy engines). To do this, go to the Settings > Deployment > System
Forcepoint DLP Deployment Guide  33
Scaling Forcepoint DLP
Modules page, then click Load Balancing. Select a service, then indicate which
policy engine to assign to that service.
Note
Forcepoint recommends that you do not distribute the load
to the management server.
●
The number of users grows
A typical small organization (1–500 users) might only need a management server
and a protector to monitor traffic. A larger organization (500–2,500 users) might
have a management server, a supplemental Forcepoint DLP server, and a
protector, with load balancing between the protector and supplemental server.
(The management server cannot be used for load balancing.)
As the number of users grows, so does the need for additional Forcepoint DLP
servers.
●
The number of transactions grows
This is the most important requirement for determining the number of Forcepoint
DLP components needed. Typically the number of transactions grows as the
number of users grows.
In monitoring mode, Forcepoint recommends having 1 protector per 20,000 users.
This calculation assumes:
■
The protector is monitoring HTTP and SMTP
■
There are 9 busy hours per day
■
There are approximately 20 million transactions per day with a ratio of 15:1
HTTP:SMTP. (HTTP includes GETs and POSTs.)
For more users, add an extra Forcepoint DLP server and balance the load between
the protector and the extra server.
In blocking mode, Forcepoint recommends 1 management server, 1 V Series
appliance with Forcepoint Email Security software, and 1 V Series appliance with
Content Gateway software. This calculation assumes:
■
There are 9 busy hours per day
■
There are approximately 15 million transactions per day with a ratio of 15:1
HTTP:SMTP. (HTTP includes GETs and POSTs.)
34  Forcepoint DLP
Scaling Forcepoint DLP
For more users, add an extra Forcepoint DLP server.
The transaction volume can grow even if the user base does not. If a significant
increase in traffic is anticipated, the system may benefit from adding one or more
Forcepoint DLP servers.
●
The number of endpoints grows
With Forcepoint DLP Endpoint, when large numbers of endpoint clients are being
deployed, additional endpoint servers may be required. A general rule of thumb is
to add 1 Forcepoint DLP server for every 15,000 endpoint clients.
●
Moving the deployment from monitor to protect
Enforcement requires more resources than monitoring, particularly because loadbalancing must be enforced between policy engines and other Forcepoint DLP
modules.
When a deployment is moving from monitor to protect, it may benefit from an
additional Forcepoint DLP server. Note that the Forcepoint DLP Web Content
Gateway is required to enforce the HTTP channel; the protector is required to
enforce the SMTP channel.
●
Moving from a single-site to multi-site configuration
Forcepoint DLP supports multi-site, distributed deployments. An organization can
have a local policy engine on the protector, for example, and distributed (primary
and secondary) fingerprint repositories. There can be a management server in one
location and one or more supplemental Forcepoint DLP servers in other locations.
Administrators have the option to use the crawlers on the Forcepoint DLP servers
alone to do fingerprint and discovery scans, or to install the crawler agent on
additional servers to improve performance.
Many scalable options are available. See Most common deployments, page 14, for
typical component distributions.
Organizations with multiple geographical locations need a protector for each site.
A deployment with low latency between two geographically distributed sites
might need two protectors and two supplemental Forcepoint DLP servers.
Forcepoint DLP Deployment Guide  35
Scaling Forcepoint DLP
●
Adding branch offices
Each branch office requires a protector. When a branch office is added or
acquired, add a protector.
●
Adding HTTP, SMTP and FTP egress points
If egress points are being added to the network structure, a protector is needed to
monitor each egress point. Each one also needs a Web Content Gateway instance
if HTTP protection is required.
●
The network grows (in GB)
In deployments that use network discovery, the network size greatly affects sizing
requirements, as does the frequency of full versus differential scans. Growing
networks may require an additional crawler or Forcepoint DLP server.
●
Repositories such as forensics, fingerprint, policy database are reaching their
maximum capacity
The Forcepoint DLP software has default settings for the disk space requirements
of its fingerprint and forensic repositories, but these values can be modified.
Organizations with larger transaction volumes and numbers of users can adjust
values significantly upward.
At some point, however, it may be necessary to add another server to
accommodate these repositories and increase available disk space. The forensics
repository can get very large. It has a default setting of 40 GB. The archive has a
default setting of 50 GB.
Adding modules to the deployment
If network and security requirements dictate the need to add new agents or other
modules, most can be added using the Forcepoint Security Installer (the Windows
installer).
During installation, the administrator is prompted to provide the FQDN of the
management server and the credentials for a Forcepoint Security Manager
administrator with Forcepoint DLP system modules permissions. This allows the new
module to register automatically with the management server.
After installation, to accept the default configuration, an administrator must click
Deploy in the Security Manager to complete the registration process. To customize the
configuration before deploying, go to the Settings > Deployment > System Modules
page and select the module to edit.
Only a Security Manager administrator with system modules permissions can install
or configure new network elements.
For information on adding and configuring modules, see “Adding modules” in the
Forcepoint DLP Administrator Help.
36  Forcepoint DLP
Scaling Forcepoint DLP
Value of additional policy engines
Policy engines analyze transactions sent from various agents and protectors. The
protector monitors network traffic and sends transactions to policy engines for
analysis. Because the CPU load on the protector is much lighter than on a policy
engine, when scaling up, add more policy engines (not protectors) and load-balance
the analysis between them.
Assessing the need for additional policy engines
To check the number of transactions analyzed by a policy engine instance:
1. Log on to the Security Manager.
2. Go to the Main > Status > System Health page.
3. Select the policy engine instance, then review its “Analysis status” chart.
Red on the chart indicates a heavy load on the policy engine during the corresponding
period.
In monitoring mode, a few red bars may not be an issue. The system will process the
incidents during a less busy period.
In blocking mode, even one hour of red is undesirable. If a red bar appears, perform
load balancing, and, if that does not resolve the issue, add a new Forcepoint DLP
server.
Optimizing policy engine performance
●
Try to avoid analysis of incoming traffic. If incoming traffic analysis is a must, try
to limit it to specific domains.
●
Never scan all networks; establish limits.
●
Check the top policies to see if there are:
●
■
Any false positives
■
Unwanted or unneeded policies
If possible, make sure no spam SMTP mail is undergoing analysis.
Forcepoint DLP Deployment Guide  37
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