Cisco Cloud Web Security

Cisco Cloud Web Security
Cisco Cloud
Web Security
WSA Deployment Guide
Internal Use Only
October 2014
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Cisco CWS – WSA/WSAv Deployment Guide
Contents
Introduction.................................................................................................................................................... 1
Cloud Deployment ..................................................................................................................................... 1
Additional Redirect Methods ..................................................................................................................... 1
Prepare.......................................................................................................................................................... 2
Verify connection to a tower ...................................................................................................................... 2
Create authentication license key ............................................................................................................. 3
Deploy ........................................................................................................................................................... 5
Configure WSA Connector ........................................................................................................................ 5
Run the System Setup Wizard ............................................................................................................... 5
Add an Authentication Realm ................................................................................................................ 9
Configure Identity Management........................................................................................................... 12
Configure Directory Groups ................................................................................................................. 13
Configure WSAv Connector .................................................................................................................... 14
Test ............................................................................................................................................................. 16
Verify web redirection to the cloud .......................................................................................................... 16
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Cisco CWS – WSA/WSAv Deployment Guide
0
Cisco Email Security Customer Messaging Framework
Introduction
Integrate CWS and WSA to enable identity information to the cloud and extend other on-premises
enterprise features to Cloud Web Security customers.
This document provides directions to redirect network traffic to CWS through the WSA/WSAv Connectors.
*Note: we refer to our cloud proxies as towers. You will see the terms “proxy” and “tower” used
interchangeably throughout the document.
Cloud Deployment
Deployment is divided into the following three sections
Prepare
Deploy
Test
Additional Redirect Methods
There are 4 additional redirection methods that have corresponding deployment guides. Deployment
guides for each redirection methods can be found here, under Technical Collateral.
Cisco Integrated
Services Router (ISR
G2 with CWS
Connector)
Save bandwidth, money and resources by intelligently redirecting
Internet traffic from branch offices directly to the cloud to enforce
security and control policies. Apply acceptable use policy to all users
regardless of location.
Next Generation
Firewall (ASA/ASAv
with CWS Connector)
Capitalize ASA investments by offloading content scanning to
Cisco’s cloud through CWS. Apply acceptable use policy to the
company, groups or individual users.
Cisco AnyConnect
Secure Mobility Client
(AnyConnect)
Authenticate and redirect web traffic securely whenever the end user
is off the corporate network. CWS leverages cached user
credentials and directory information when they are away from the
office or VPN, ensuring that exactly the same web-usage policies are
applied.
Standalone
Deployment
Deploy a simple web security solution that does not require any
additional hardware. Connect to Cisco’s Cloud Web Security service
using existing browser settings and PAC/WPAD files.
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Prepare
Verify connection to a tower
Site-to-tower communication is accomplished over TCP port 8080. HTTP and HTTPS requests are sent
to a cloud scanning tower in this method. Therefore, TCP port 8080 outbound is required to be open for
all users within the organization. For security reasons, Cisco recommends that port 8080 outbound
destinations be limited to the scanning towers provisioned for the customer’s account.
Reference video: Verify connection to a tower
Step 1: Log on to a client computer inside the customer’s network.
Step 2: Click on the Control Panel and go to Programs and Features.
Step 3: Click Turn on Windows features on or off. Scroll down the list of available features until you
find the Telnet Client. Check the box and click OK. Now that the Telnet Client is installed, we can
resume our test.
Figure 1.1
Step 4: Open the command line window and type command ‘telnet [tower IP address] 8080.” A
successful connection is noted by a blank screen and blinking cursor.
Figure 1.2
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Create authentication license key
Reference video: Authentication license key creation and management
Step 1: Log on to the Cisco Cloud Web Security portal at https://scancenter.scansafe.com/.
Step 2: From the Admin tab, mouse over Authentication, and select the key that you would like to
generate. The options are Company Key and Group Key. To have a single key for all users in the
company (can be used in various Connectors), AnyConnect, or a mixture of them all, select Company
Key.
Step 3: Notice that no Company Key currently exists in this account. Click the Create Key button to
create the Company Key . If one already exists and you don’t know the whole string (only the last four
characters will be seen), then you will have to revoke it before you can create a new one, but then if it
is in use anywhere (Connectors or AnyConnect) then it will have to be replaced with the new one.
Step 4: The key is active immediately. The email option below is only for the admin to have a backup
of the key. Note: Once you navigate away from the page you’ll no longer see the complete string of
the key (only the last 4 characters will be displayed henceforth).
Figure 1.3
Step 5: Copy the entire alphanumeric string in the Authentication Key field and record it in a
document that will be backed up.
*Note: The second option is to create a group key by selecting Group Key under Authentication. To
create a group key you may either use an existing directory group or you may create a custom group
under  Admin  Management  Groups.
Step 6: Click on the Create Key button which corresponds to the group for which you are creating a
key.
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Figure 1.4
*Note: It is the same UI and process for creating a Company Key
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Deploy
Configure WSA Connector
This document is intended to provide an overview of the deployment process. For more detailed
information and troubleshooting, please refer to the Admin Guide.
Typically when configuration changes are submitted on the WSA they are not immediately committed.
When you see the yellow Commit Changes button appear in the upper right after making a configuration
change, you must click it and then you will be presented with an option to commit the change with notes
or abandon the changes. Please be sure to commit your changes as you complete the recommended
configurations in this guide.
Figure 2.1
Run the System Setup Wizard
Step 1: Logon to the WSA/WSAv appliance. Default credentials are:
 Username – admin
 Password – ironport
Figure 2.2
Step 2: To begin setup, select System Administrator > System Setup Wizard
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Figure 2.3
Step 3: Configure the following:
 Default System Hostname – a DNS name that will resolve to the IP address of this WSA
 DNS Server – supply at least one DNS server
 NTP Server – supply a server where this WSA may automatically configure time from
 Time Zone – select the time zone for which this WSA resides in
 Appliance Mode of Operation – select Cloud Web Security Connector
Figure 2.4
Step 4: Define the Following:
 Cloud Web Security Proxy Servers – supply the primary and secondary (backup) Cloud Web
Security Proxy Server’s host names of IP addresses.
 Failure Handling – this is how the WSA will handle web requests if it loses connection with
both primary and secondary Cloud Web Security Proxy Servers.
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Cisco CWS – WSA Deployment Guide

Prepare
Deploy
Test
Cloud Web Security Authorization Scheme, – bullet Send authorization key information with
transaction, and provide the Authentication Key generated from ScanCenter (see above).
Figure 2.5
Step 5: Provide an IP address, either IPv4 and/or IPv6, to be associated with this WSA. Subnet mask
should be in CIDR notation.
Figure 2.6
Step 6: Configure the Default Gateway this WSA will use.
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Cisco CWS – WSA Deployment Guide
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Deploy
Test
Figure 2.7
Step 7: If clients will use a PAC/WPAD file or layer 4 switch to forward web traffic to this WSA, select
Layer 4 Switch or No Device. If clients will transparently redirect traffic to this WSA, select WCCP v2
Router.
Figure 2.8
Step 8: Supply a secure password, an email address to send system alerts to, and (optionally) an
SMTP relay to send email through.
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Figure 2.9
Step 9: Once configuration is complete, click Install This Configuration.
Figure 2.10
Add an Authentication Realm
Step 1: To create an authentication realm, click Network > Authentication.
Figure 2.11
Step 2: Click Add Realm.
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Cisco CWS – WSA Deployment Guide
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Deploy
Test
Figure 2.12
Step 3: Configure the following and then click Join Domain:




Ream Name – is a friendly name that identifies the authentication realm.
Authentication Server Type and Scheme(s) – select Active Directory (or LDAP if not using
Microsoft Active Directory).
Active Directory Server – supply at least one domain controller host name or IP address that will
manage authenticating users.
Active Directory Domain – supply the FQDN of the active directory domain.
Figure 2.13
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Step 4: After clicking Join Domain, you will be presented with an authentication challenge. The
credentials used should have permissions to add objects to Active Directory. These credentials will
NOT be saved and are used this one time to create a computer account in Active Directory for the
WSA.
Figure 2.14
Step 5: Once the computer account for the WSA has been completed, click Start Test to ensure all
authentication operations function as expected. Once the test has completed successfully, click
Submit.
Figure 2.15
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Configure Identity Management
Step 1: To configure identity management, select Web Security Manager > Identities.
Figure 2.16
Step 2: Click Add Identity.
Figure 2.17
Step 3: Configure the following and then click Submit:





Name – is a friendly name that identifies these identity settings.
Identification and Authentication – select Authenticate Users from the dropdown list.
Select a Realm or Sequence – select your authentication realm.
Select a Scheme – select Use NTLMSSP.
Authentication Surrogates – bullet IP Address.
*Note: cookie surrogates may not work with non-browser apps, such as desktop widgets or agents.
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Figure 2.18
Configure Directory Groups
Step 1: To identify directory groups that should be used with CWS, select Network > Cloud
Connector.
Figure 2.19
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Cisco CWS – WSA Deployment Guide
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Deploy
Test
Step 2: Click Edit Groups.
Figure 2.20
Step 3: Select the groups to use with CWS in the Directory Search pane on the left, and click Add to
place those groups in the Authorized Groups pane on the right. When complete click Done.
Figure 2.21
Configure WSAv Connector
This guide should serve as a supplement to the current instructions.
Step 1: Download the WSAv Image

Please contact your SE to obtain the WSAv license.
Step 2: Apply the WSAv Connector License

Follow the video guide for help with installation:
https://www.youtube.com/watch?v=3syECpx68HQ
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Step 3: Size the WSAv based on the Number of Transactions


Set up the number of WSAvs needed based on the sizing. Since the WSAv Connector is not
performing any security services, the “Essentials” RPS numbers can be used as guidance. The
license you downloaded in the previous step can be used to activate all the WSAvs.
The WSAV sizing guidelines for the Connector are in the table below.
Peak RPS (Requests per Second)
Sustained RPS
Sustained Bandwidth
S300V
608
608
90 Mbps
S100V
316
316
47 Mbps
S000V
147
147
22 Mbps
Step 4: Download GD virtual image at or above ASyncOS 8.0.6


Go to the Cisco Product Download page here
Navigate to Security
Web Security
Web Security Virtual Appliance
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Cisco CWS – WSA Deployment Guide
Prepare
Deploy
Test
Test
Verify web redirection to the cloud
Step 1: From a client machine, browse to whoami.scansafe.net. If a message is displayed, “User is not
currently using the service,” then the traffic is not redirected to the Cisco cloud. This can be useful in
determining if: the user is being resolved correctly, any groups being discovered, the internal/external IP
of the user/location, and what Connector is in use.
This is an example of a successful whoami.scansafe.net output:
authUserName: "WinNT://CISCO\\user"
authenticated: true
companyName: Cisco
connectorGuid: 0123456789ABCDEF1234-0123456789AB
connectorVersion: coeus-x-x-x-xxx
countryCode: US
externalIp: 12.34.56.78
groupNames:
- "WinNT://CISCO\\Group”
internalIp: 1.2.3.4
logicalTowerNumber: 1782
staticGroupNames:
- "WinNT://CISCO\\Group”
userName: "WinNT://CISCO\\user"
Step 2: From a client machine, browse to policytrace.scansafe.net and enter a URL to see how the web
request is processed against the current web filtering policy.
Step 3: With SearchAhead enabled in ScanCenter (the CWS admin portal), browse to Google, Bing, or
Yahoo and search for something. The SearchAhead data should be prepended to each search result in
the form of a green, yellow, or red dot. Mouse over the dot to see what information is contained within.
*Note: the search engine may enforce search results being displayed using HTTPS (such as Google). In
this case you must enable HTTPS Inspection to see the Search Ahead results.
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Cisco Systems, Inc.
San Jose, CA
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Cisco Systems (USA) Pte. Ltd.
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The Netherlands
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Go to this URL: www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does
not imply a partnership relationship between Cisco and any other company. (1 1 1OR)
Printed in USA
C11-727200-00 04/13
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