Firewall. Cyberoam Cyberoam Central Console
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Cyberoam Central Console User Guide
Firewall
A firewall protects the network from unauthorized access and typically guards the LAN and DMZ networks against malicious access; however, firewalls may also be configured to limit the access to harmful sites for LAN users.
The responsibility of firewall is to grant access from Internet to DMZ or Service Network according to the Rules and Policies configured. It also keeps watch on state of connection and denies any traffic that is out of connection state.
Firewall rules control traffic passing through the Cyberoam. Depending on the instruction in the rule, Cyberoam decides on how to process the access request. When Cyberoam receives the request, it checks for the source address, destination address and the services and tries to match with the firewall rule. If Identity match is also specified then firewall will search in the Live Users
Connections for the Identity check. If Identity (User) found in the Live User Connections and all other matching criteria fulfills then action specified in the rule will be applied. Action can be allow or deny.
If Action is ‘Allow’ then each rule can be further configured to apply source or destination NATting
(Network Address Translation). You can also apply different protection settings to the traffic controlled by firewall:
• Enable load balancing between multiple links
• Configure antivirus protection and spam filtering for SMTP, IMAP, POP3, and HTTP traffic. To apply antivirus protection and spam filtering, you need to subscribe for Gateway Anti Virus and
Gateway Anti Spam modules individually. Refer to Licensing section for details.
• Implement Intrusion detection and prevention. To apply IDP policy you need to subscribe for
Intrusion Detection and Prevention module. Refer to Licensing section for details.
• Configure content filtering policies. To apply content filtering you need to subscribe for Web and
Application Filter module. Refer to Licensing section for details.
• Apply bandwidth policy restriction
By default, Cyberoam blocks any traffic to LAN.
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Default Firewall rules
At the time of deployment, Cyberoam allows to define one of the following Internet Access policies using Network Configuration Wizard:
• General Internet policy
• Strict Internet policy
Depending on the Internet Access policy set through Network Configuration Wizard, Cyberoam
Cyberoam Central Console User Guide defines the two default firewall rules as follows:
Monitor only (Cyberoam applies the firewall rules in the order as specified below)
1. Masquerade and Allow entire LAN to WAN traffic for all the authenticated users after applying following policies:
Internet Access policy – User specific
Bandwidth policy – User specific
Anti Virus & Anti Spam policy – Allows SMTP, POP3, IMAP and HTTP traffic without scanning
2. Masquerade and Allow entire LAN to WAN traffic for all the users without scanning SMTP,
POP3, IMAP and HTTP traffic
General Internet policy (Cyberoam applies the firewall rules in the order as specified below)
1. Masquerade and Allow entire LAN to WAN traffic for all the authenticated users after applying following policies:
Internet Access policy – User specific
Bandwidth policy – User specific
Anti Virus & Anti Spam policy - Scan SMTP, POP3, IMAP and HTTP traffic
2. Masquerade and Allow entire LAN to WAN traffic for all the users after applying following policies:
Internet Access policy – Applies ‘General Corporate Policy’ to block Porn, Nudity,
AdultContent, URL TranslationSites, Drugs, CrimeandSuicide, Gambling,
MilitancyandExtremist, PhishingandFraud, Violence, Weapons categories
IDP – General policy
Anti Virus & Anti Spam policy - Scan SMTP, POP3, IMAP and HTTP traffic
Strict Internet policy (Cyberoam applies the firewall rules in the order as specified below)
1. Masquerade and Allow entire LAN to WAN traffic for all the authenticated users after applying following policies:
Internet Access policy – User specific
Bandwidth policy – User specific
IDP – General policy
Anti Virus & Anti Spam policy - Scan SMTP, POP3, IMAP and HTTP traffic
2. Drop entire LAN to WAN traffic for all the users
Default Firewall rules can be modified as per the requirement but cannot be deleted
IDP policy will not be effective until Intrusion Detection and Prevention
(IDP) module is subscribed
Virus and Spam policy will not be effective until Gateway Anti Virus and
Gateway Anti-spam modules are subscribed respectively
If Internet Access Policy is not set through Network Configuration Wizard at the time of deployment, the entire traffic is dropped
Additional firewall rules can be defined to extend or override the default rules. For example, rules can be created that block certain types of traffic such as FTP from the LAN to the WAN, or allow certain types of traffic from specific WAN hosts to specific LAN hosts, or restrict use of certain
Cyberoam Central Console User Guide protocols such as Telnet to authorized users on the LAN.
Custom rules evaluate network traffic source IP addresses, destination IP addresses, User, IP protocol types, and compare the information to access rules created on the Cyberoam appliance.
Custom rules take precedence, and override the default Cyberoam firewall rules.
Create Firewall Rule
Use to
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Previous versions allowed creating firewall rules based on source and destination IP addresses and services but now Cyberoam’s Identity based firewall allows to create firewall rules embedding user identity into the firewall rule matching criteria.
Firewall rule matching criteria now includes:
• Source and Destination Zone and Host
• User
• Service
Following Unified Threat Control policies can be attached to the firewall rule as per the defined matching criteria:
• Intrusion Detection and Prevention (IDP)
To create a firewall rule, you should:
• Define matching criteria
• Associate action to the matching criteria
• Attach the threat management policies
For example, now you can:
• Restrict the bandwidth usage to 256kb for the user John every time he logs on from the IP
192.168.2.22
• Restrict the bandwidth usage to 1024kb for the user Mac if he logs on in working hours from the
IP 192.168.2.22
Processing of firewall rules is top downwards and the first suitable rule found is applied.
Hence, while adding multiple rules, it is necessary to put specific rules before general rules.
Otherwise, a general rule might allow a packet that you specifically have a rule written to deny later in the list. When a packet matches the rule, the packet is immediately dropped or forwarded without being tested by the rest of the rules in the list.
Cyberoam Central Console User Guide
To create firewall rule
2. Select Group ID. After successful creation, Firewall rule can be applied to any or all the devices in the selected group.
3. Specify source zone and host IP address/network address to which the rule applies.
4. To define host group based firewall rule you need to define host group.
5. Under Select Address, click Create Host Group to define host group from firewall rule itself or from
Firewall Æ Host Group Æ Create
Under Select Address, click Add Host to define host group from firewall rule itself rule itself or from
Firewall Æ Host Æ Add Host
6. Click Enable to check the user identity. (Only if source zone is LAN/DMZ)
Check identity allows you to check whether the specified user/user group from the selected zone is allowed the access of the selected service or not.
Enable check identity to limit access to available services and apply following policies per user:
• Internet Access policy for Content Filtering (User’s Internet Access policy will be applied automatically but will not be effective till the Web and Content Filtering module is subscribed)
• IDP (User’s IDP policy will be applied automatically but will not be effective till the IDP module is subscribed)
• Anti Virus scanning (User’s anti virus policy will be applied automatically but it will not be effective till the Gateway Anti Virus module is subscribed)
• Anti Spam scanning (User’s anti spam policy will be applied automatically but it will not be effective till the Gateway Anti Spam module is subscribed)
• Bandwidth policy - User’s bandwidth policy will be applied automatically
• The policy selected in Route through Gateway is the static routing policy that is applicable only if more than one gateway is defined and used for load balancing.
7. Specify destination zone and host IP address /network address to which the rule applies.
8. To define host group based firewall rule you need to define host group.
Under Select Address, click Create Host Group to define host group from firewall rule itself or from
Firewall Æ Host Group Æ Create
Under Select Address, click Add Host to define host group from firewall rule itself rule itself or from
Firewall Æ Host Æ Add Host
9. Select service/service group to which the rule applies.
Services represent types of Internet data transmitted via particular protocols or applications.
Protect by configuring rules to
• block services at specific zone
• limit some or all users from accessing certain services
• allow only specific user to communicate using specific service
Under Select Here, click Create Service Group to define service group from firewall rule itself rule itself or from
Firewall Æ Service Æ Create Service
Cyberoam provides several standard services and allows creating the custom services also.
Under Select Here, click Create Service to define service from firewall rule itself rule itself or from
Firewall Æ Service Æ Create Service
Cyberoam Central Console User Guide
10. Select Schedule for the rule
11. Select rule action
Accept – Allow access
Drop – Silently discard i.e. without sending ‘ICMP port unreachable’ message to the source
Reject – Deny access and send ‘ICMP port unreachable’ message to the source
12. Click Apply Source NAT and select the SNAT policy to be applied (Only if Action is ‘ACCEPT’)
It allows access but after changing source IP address i.e. source IP address is substituted by the IP address specified in the SNAT policy.
You can create SNAT policy from firewall rule itself or from
Firewall Æ SNAT Policy Æ
Create
This option is not available if Cyberoam is deployed as Bridge
13. Click Advanced Settings to apply different protection settings to the traffic controlled by firewall. You can:
• Enable load balancing and failover when multiple links are configured
• Configure antivirus protection and spam filtering for SMTP, IMAP, POP3, and HTTP policies.
• Implement Intrusion detection and prevention.
• Configure content filtering policies.
• Apply bandwidth policy
14. Select DNAT policy to be applied
DNAT rule tells the firewall to forward the requests from the specified machine and port to the specified machine and port.
Under Select Here, click Create DNAT Policy to define dnat policy from firewall rule itself rule itself or from
Firewall Æ DNAT Policy Æ Create
This option is not available if Cyberoam is deployed as Bridge
15. Select IDP policy for the rule. Refer to IDP, Policy for details on creating IDP policy.
IDP policy will be applicable only for those Cyberoam Appliances for whom
Intrusion Detection and Prevention add-on module is subscribed.
16. Select Internet access policy for the rule. It can be applied to LAN to WAN rule only.
Internet Access policy controls web access. Refer to Policies, Internet Access Policy for details on creating Internet Access policy.
Content filtering will be applicable only for those Cyberoam Appliances for whom Web and Application Filter add-on module is subscribed.
17. Select Bandwidth policy for the rule
Only Firewall rule based Bandwidth policy can be applied. Bandwidth policy allocates & limits the maximum bandwidth usage of the user. Refer to Policies, Bandwidth Policy for details on creating Bandwidth policy.
Cyberoam Central Console User Guide
18. Click the protocol for which the virus and spam scanning is to be enabled
By default, HTTP scanning is enabled.
If Check Identity is enabled, the policy will be applied to the specified user/user group only.
Antivirus protection and spam filtering will be applicable only for those
Cyberoam Appliances for whom Gateway Anti Virus and Gateway Anti
Spam modules are individually subscribed.
19. Click Log Traffic to enable/disable traffic logging for the rule. Make sure, firewall rule logging in
ON/Enable from the Logging Management. Refer to Cyberoam Console Guide, Cyberoam
Management for more details.
To log the traffic permitted and denied by the firewall rule, you need to ON/Enable the firewall rule logging from the Web Admin Console
ÆFirewall rule and from the Telnet
Console
ÆCyberoam Management.
20. Specify full description of the rule
21. Click create to create the rule
Cyberoam Central Console User Guide
To update firewall rule
created for the selected group will be displayed. click
Edit icon
against the rule to be modified.
2. Displays source zone and host IP address/network address to which the rule applies. Modify host IP address/network address, if required.
3. To define host group based firewall rule you need to define host group. Under Select Address, click Create Host Group to define host group from firewall rule itself or from
Firewall Æ
Host Group Æ Create
Under Select Address, click Add Host to define host group from firewall rule itself rule itself or from
Firewall Æ Host Æ Add Host
4. Click Enable to check the user identity. (Only if source zone is LAN/DMZ)
Check identity allows you to check whether the specified user/user group from the selected zone is allowed the access of the selected service or not.
Enable check identity to limit access to available services and apply following policies per user:
• Internet Access policy for Content Filtering (User’s Internet Access policy will be applied automatically but will not be effective till the Web and Content Filtering module is subscribed)
• IDP (User’s IDP policy will be applied automatically but will not be effective till the IDP module is subscribed)
• Anti Virus scanning (User’s anti virus policy will be applied automatically but it will not be effective till the Gateway Anti Virus module is subscribed)
• Anti Spam scanning (User’s anti spam policy will be applied automatically but it will not be effective till the Gateway Anti Spam module is subscribed)
• Bandwidth policy - User’s bandwidth policy will be applied automatically
• The policy selected in Route through Gateway is the static routing policy that is applicable only if more than one gateway is defined and used for load balancing.
5. Displays destination zone and host IP address /network address to which the rule applies.
6. Modify host IP address/network address, if required.
To define host group based firewall rule you need to define host group.
Under Select Address, click Create Host Group to define host group from firewall rule itself or from
Firewall Æ Host Group Æ Create
Under Select Address, click Add Host to define host group from firewall rule itself rule itself or from
Firewall Æ Host Æ Add Host
7. Displays service/service group applied to the rule modify if required.
Services represent types of Internet data transmitted via particular protocols or applications.
Protect by configuring rules to
• block services at specific zone
• limit some or all users from accessing certain services
• allow only specific user to communicate using specific service
Under Select Here, click Create Service Group to define service group from firewall rule itself rule itself or from
Firewall Æ Service Æ Create Service
Cyberoam Central Console User Guide
8. Displays schedule applied to the rule, modify if required
9. Displays rule action, modify if required
Cyberoam provides several standard services and allows creating the custom services also.
Under Select Here, click Create Service to define service from firewall rule itself rule itself or from
Firewall Æ Service Æ Create Service
Accept – Allow access
Drop – Silently discard i.e. without sending ‘ICMP port unreachable’ message to the source
Reject – Deny access and send ‘ICMP port unreachable’ message to the source
10. Click Apply Source NAT and select the SNAT policy to be applied (Only if Action is ‘ACCEPT’)
It allows access but after changing source IP address i.e. source IP address is substituted by the IP address specified in the SNAT policy.
You can create SNAT policy from firewall rule itself or from
Firewall Æ SNAT Policy Æ
Create
This option is not available if Cyberoam is deployed as Bridge
11. Click Advanced Settings to apply different protection settings to the traffic controlled by firewall. You can:
• Enable load balancing and failover when multiple links are configured
• Configure antivirus protection and spam filtering for SMTP, IMAP, POP3, and HTTP policies.
• Implement Intrusion detection and prevention.
• Configure content filtering policies.
• Apply bandwidth policy
12. Displayed DNAT policy applied to the rule, modify if required
DNAT rule tells the firewall to forward the requests from the specified machine and port to the specified machine and port.
Under Select Here, click Create DNAT Policy to define dnat policy from firewall rule itself rule itself or from
Firewall Æ DNAT Policy Æ Create
This option is not available if Cyberoam is deployed as Birdge
13. Displays IDP policy applied to the rule, modify if required. Refer to IDP, Policy for details on creating IDP policy.
IDP policy will be applicable only for those Cyberoam Appliances for whom
Intrusion Detection and Prevention add-on module is subscribed.
14. Displays Internet access policy applied to the rule, modify if required. It can be applied to LAN to WAN rule only.
Internet Access policy controls web access. Refer to Policies, Internet Access Policy for details on creating Internet Access policy.
Content filtering will be applicable only for those Cyberoam Appliances for whom Web and Application Filter add-on module is subscribed.
Cyberoam Central Console User Guide
15. Displays Bandwidth policy applied to the rule, modify if required.
Only Firewall rule based Bandwidth policy can be applied. Bandwidth policy allocates & limits the maximum bandwidth usage of the user. Refer to Policies, Bandwidth Policy for details on creating Bandwidth policy.
16. Click the protocol for which the virus and spam scanning is to be enabled
By default, HTTP scanning is enabled.
Antivirus protection and spam filtering will be applicable only for those
Cyberoam Appliances for whom Gateway Anti Virus and Gateway Anti
Spam modules are individually subscribed.
17. Click Log Traffic to enable/disable traffic logging for the rule. Make sure, firewall rule logging in
ON/Enable from the Logging Management. Refer to Cyberoam Console Guide, Cyberoam
Management for more details.
To log the traffic permitted and denied by the firewall rule, you need to ON/Enable the firewall rule logging from the Web Admin Console
ÆFirewall rule and from the Telnet
Console
ÆCyberoam Management. Specify full description of the rule
18. Displays full description of the rule, modify if required
19. Click Save to save the rule
Cyberoam Central Console User Guide
Manage Firewall Rules
Use to:
• Update rule
• Delete rule. Deleting firewall rule will delete firewall rule from Cyberoam Central Console and not from the devices.
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Manage firewall rule screen components
Select Firewall
Æ Manage Rule to view the list of rules
Append Rule button - Click to add zone to zone rule
Select Column button – Click to customize the number of columns to be displayed on the page
Enable/Disable rule icon - Click to activate/deactive the rule. If you do not want to apply the firewall rule temporarily, disable rule instead of deleting.
Green – Active Rule
Red – Deactive Rule
Edit icon - Click to edit the rule. Refer to Update Firewall rule for more details.
Insert icon - Click to insert a new rule before the existing rule. Refer to Create Firewall Rule for more details.
Delete icon - Click to delete the rule. Deleting firewall rule will delete firewall rule from
Cyberoam Central Console and not from the devices. To delete firewall rule from the device, use
Remove function.
Apply button - Click to apply firewall rule to all the selected devices in the selected Group.
Remove button selected Group.
- Click to remove firewall rule from all the selected devices in the
To append rule
Append Rule adds the new rule above the default rules if zone-to-zone rule set exists else appends new rule as new zone-to-zone rule set in the end.
Select Firewall
Æ Manage Firewall
Click Append rule to open the create firewall rule page.
Refer to Define Firewall Rule for more details.
Cyberoam Central Console User Guide
To customize Screen Display
By default, Manage Firewall Rules page displays details of the rule in the following eight columns:
ID, Enable, Source, Identity, Destination, Service, Action, and Manage. You can customize the number of columns to be displayed as per your requirement.
2. Click Select Columns
3. It opens the new window. ‘Available Columns’ list displays the columns that can be displayed on the page.
4. Click the required column and use Right arrow button to move the selected column to the
‘Selected Columns’ list
Cyberoam Central Console User Guide
Host
Use to:
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Firewall rule can be created for the individual host or host groups. By default, the numbers of hosts equal to the ports in the appliance are already created.
Add Host
2. Enter host name
3. Select host type i.e. single IP address with subnet or range of IP addresses
4. Select host group
5. Create to add a new host
Manage Host
Use to:
• Assign host to Device (Cyberoam Appliance)
• Delete host. Deleting host will delete host from the Cyberoam Central Console and not from the devices.
To assign Host to a Device
2. Click Apply against the host name. It opens a new page and displays group wise devices.
Enable the check box against the group or device to which the host is to be added.
3. Click Apply. Applied will be displayed against the group/device, if the host is added successfully.
Cyberoam Central Console User Guide
To delete host
2. Click Del against the host to be deleted OR click Select All to delete all the hosts
Cyberoam Central Console User Guide
Host Group
Use to:
• Create Host group
• Manage Host group
Host group is the grouping on hosts.
Create Host Group
2. Enter host group name
3. Enter description for the group
4. Click Create to create the group. If the Group is successfully created, you can add the hosts to the group. Refer to Add Host to Host Group for details.
Manage Host Group
Use to:
• View host group details
• Assign Host group to a Device
• Add/Delete host from host group
• Delete host group. Deleting host group will delete host group from the Cyberoam Central
Console and not from the devices.
To add Host to Host Group
1. Click Add if adding host at the time of creation of the Host Group OR Select
Firewall Æ
Host Group Æ Manage to view the list of groups created.
2. Click host group to which host is to be added. Host Group details is displayed.
3. Click Add. List of hosts that can be added to the group is displayed.
4. Click against the host to be added
Cyberoam Central Console User Guide
To assign Host Group to a Device
2. Click Apply against the host name. It open as a new page and displays group wise devices.
Enable the check box against the group or device to which the host group is to be added.
3. Click Apply. Applied will be displayed against the group/device, if the host group is added successfully.
Cyberoam Central Console User Guide
To delete Host from Host Group
2. Click host group from which the host is to be deleted.
3. Click Del against the hosts to be deleted when the list of hosts that can be added to the group is displayed.
To delete Host Group
2. Click Del against the groups to be deleted
Deleting host group will delete host group from the Cyberoam Central Console and not from the devices.
Cyberoam Central Console User Guide
Services
Services represent types of Internet data transmitted via particular protocols or applications.
Protect your network by configuring firewall rules to
• block services for specific zone
• limit some or all users from accessing certain services
• allow only specific user to communicate using specific service
Cyberoam provides several standard services and allows creating:
• Customized service definitions
• Firewall rule for customized service definitions
Create Service
Use to:
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Update Service .To edit service details, click the service name to be modified.
To create service
3. Select type of protocol
For IP - Select Protocol No.
For TCP - Enter Source and Destination port
For UDP - Enter Source and Destination port
For ICMP - Select ICMP Type and Code
5. Click Create to create and save the details. If service is created successfully, click Add to add protocol details. Refer to Add Protocol details for more details.
Cyberoam Central Console User Guide
To update service
3. Select type of protocol
For IP - Select Protocol No.
For TCP - Enter Source and Destination port
For UDP - Enter Source and Destination port
For ICMP - Select ICMP Type and Code
5. Click Create to create and save the details. If service is created successfully, click Add to add protocol details. Refer to Add Protocol details for more details.
Manage Service
Use to:
• View Service details
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Update Service . To edit service details, click the service name to be modified.
• Assign Service to a Device
• Add Protocol details
• Delete Protocol details
• Delete Service. Deleting service will delete service from the Cyberoam Central Console and not from the devices.
To assign Service to a Device
2. Click Apply against the Service name. It open as a new page and displays group wise devices.
Enable the check box against the group or device to which the Service is to be added.
3. Click Apply. Applied will be displayed against the group/device, if the Service is added successfully.
Cyberoam Central Console User Guide
To add protocol details
1. Click Add if adding details at the time of creation of the Service OR Select
Firewall Æ
Services Æ Manage to view the list of service and click the service to which details are to be added
3. Select type of protocol
For IP - Select Protocol No.
For TCP - Enter Source and Destination port
For UDP - Enter Source and Destination port
For ICMP - Select ICMP Type and Code
Cyberoam Central Console User Guide
To delete protocol details
from which the details are to be deleted
2. Click Del against the details to be deleted OR click Select All to select all the protocol details
3. Click Delete to delete the selected details
To delete Service
2. Click Dele against the services to be deleted or Select All to delete all the services
3. Click Delete to delete the selected services
Default Services cannot be updated or deleted
Deleting service will delete service from the Cyberoam Central Console and not from the devices.
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