Configuring Backup Server Attributes - Cisco FirePOWER ASA 5500 series Configuration Manual

Chapter 30 Configuring Tunnel Groups, Group Policies, and Users
Group Policies
To disable NEM, enter the disable keyword. To remove the NEM attribute from the running
configuration, enter the no form of this command. This option allows inheritance of a value from another
group policy.
The following example shows how to set NEM for the group policy named FirstGroup:
hostname(config)# group-policy FirstGroup attributes
hostname(config-group-policy)# nem enable

Configuring Backup Server Attributes

Configure backup servers if you plan on using them. IPSec backup servers let a VPN client connect to
the central site when the primary security appliance is unavailable.When you configure backup servers,
the security appliance pushes the server list to the client as the IPSec tunnel is established. Backup
servers do not exist until you configure them, either on the client or on the primary security appliance.
Configure backup servers either on the client or on the primary security appliance. If you configure
backup servers on the security appliance, it pushes the backup server policy to the clients in the group,
replacing the backup server list on the client if one is configured.
If you are using hostnames, it is wise to have backup DNS and WINS servers on a separate network from
Note
that of the primary DNS and WINS servers. Otherwise, if clients behind a hardware client obtain DNS
and WINS information from the hardware client via DHCP, and the connection to the primary server is
lost, and the backup servers have different DNS and WINS information, clients cannot be updated until
the DHCP lease expires. In addition, if you use hostnames and the DNS server is unavailable, significant
delays can occur.
To configure backup servers, enter the backup-servers command in group-policy configuration mode:
hostname(config-group-policy)# backup-servers {server1 server2... server10 |
clear-client-config | keep-client-config}
To remove a backup server, enter the no form of this command with the backup server specified. To
remove the backup-servers attribute from the running configuration and enable inheritance of a value for
backup-servers from another group policy, enter the no form of this command without arguments.
hostname(config-group-policy)# no backup-servers [server1 server2... server10 |
clear-client-config | keep-client-config]
The clear-client-config keyword specifies that the client uses no backup servers. The security appliance
pushes a null server list.
The keep-client-config keyword specifies that the security appliance sends no backup server
information to the client. The client uses its own backup server list, if configured. This is the default.
The server1 server 2.... server10 parameter list is a space-delimited, priority-ordered list of servers for
the VPN client to use when the primary security appliance is unavailable. This list identifies servers by
IP address or hostname. The list can be 500 characters long, and it can contain up to10 entries.
The following example shows how to configure backup servers with IP addresses 10.10.10.1 and
192.168.10.14, for the group policy named FirstGroup:
hostname(config)# group-policy FirstGroup attributes
hostname(config-group-policy)# backup-servers 10.10.10.1 192.168.10.14
Cisco Security Appliance Command Line Configuration Guide
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