This implementation describes how to set up multiple BIG-IP® systems running Application Security Manager™ (ASM) so that you can synchronize their security policies and configurations for disaster recovery. You can use this implementation to synchronize BIG-IP ASM™ security policies and configurations on systems that reside in different network segments or LANs, such as those in separate offices or data centers. Note that traffic must be routable between the network segments. If a disaster occurs at one of the offices and both devices are disabled, the latest security policies are still available on the systems in the other location.
This implementation also configures failover between systems in a redundant pair on a particular network segment. If one of the devices in a pair goes offline for any reason, the other device in the pair begins processing the application traffic.
In the figure, two sets of BIG-IP systems are set up for redundancy: one active and the other standby. Each pair is in a different network segment (LAN), and there can be additional pairs, as needed. Each LAN has one pair of devices, where both have the same default routing, but routing is not the same for the devices in the other LAN.
All of the systems are running ASM and are in the trust domain. Three device groups are set up: one Sync-Failover device group for each pair (not ASM-enabled), and one Sync-Only device group with ASM enabled using automatic synchronization for all of the systems. The systems automatically duplicate the ASM configurations and security policies on all of the systems. You can manually synchronize the BIG-IP configurations of each pair of systems when needed.
You can use device management to set up several BIG-IP® systems running Application Security Manager™ (ASM) so that the systems synchronize their security policies and configurations, and fail over to one another if a system goes offline for any reason. By using application security synchronization, you can set up application security and create security policies on one system, and can propagate them to other systems in an application security device group. In BIG-IP ASM™, a device group is two or more BIG-IP devices using the same configuration and providing consistent security policy enforcement.
You can set up application security synchronization, for example, behind an Application Delivery Controller where multiple BIG-IP systems running Application Security Manager are deployed as members of a pool. The options and security policies on all of the systems stay in sync regardless of where you update them.
When you set up ASM™ synchronization, in addition to security policies, other settings such as custom attack signatures, logging profiles, SMTP configuration, anti-virus protection, system variables, and policy templates, are synchronized with all devices in the ASM-enabled device group.
When using device management with Application Security Manager™ (ASM™), you need to be aware of the following considerations that apply specifically to application security synchronization.
Before you begin this task, verify that:
You perform this task to establish trust among devices on one or more network segments. Devices that trust each other constitute the local trust domain. A device must be a member of the local trust domain prior to joining a device group.
By default, the BIG-IP software includes a local trust domain with one member, which is the local device. You can choose any one of the BIG-IP devices slated for a device group and log into that device to add other devices to the local trust domain. For example, devices A, B, and C each initially shows only itself as a member of the local trust domain. To configure the local trust domain to include all three devices, you can simply log into device A and add devices B and C to the local trust domain. Note that there is no need to repeat this process on devices B and C.
This task establishes failover capability between two or more BIG-IP devices. If the active device in a Sync-Failover device group becomes unavailable, the configuration objects fail over to another member of the device group and traffic processing is unaffected. You perform this task on any one of the authority devices within the local trust domain.
Repeat this task for each Sync-Failover device group that you want to create for your network configuration.
You have set up disaster recovery for multiple BIG-IP® systems running Application Security Manager™ (ASM). Each office or data center has an active system and a standby that takes over if the active system should fail. You must manually synchronize the BIG-IP configuration from one system to the other if you change the configuration.
You can create new security policies or update existing ones on any of the devices in the group, or update the ASM™ configuration options (Application Security>Options). Any changes you make on one device are automatically synchronized with the other devices in the ASM-enabled Sync-Only device group.
If Attack Signatures Update Mode is scheduled for automatic update, the attack signature update settings are synchronized. Each device in the device group updates itself independently according to the configured schedule. If you manually upload attack signatures or click Upload Signatures to update from the server, the update is propagated to all of the devices in the device group.