You can install and run the SSL VPN self-monitoring and failover scripts on each SSL VPN server in order to provide automatic monitoring and failover support for the SSL VPN servers that are behind a Linux Access Gateway.
When the health status of an SSL VPN server is bad, these scripts modify the IPTables entries on that server to stop the Access Gateway from sending connection requests to that particular SSL VPN server. When the SSL VPN server health status returns to normal, the scripts remove the iptables entries and allow the Access Gateway to communicate with the SSL VPN server. You must perform the following tasks to configure load balancing and fault tolerance through the Access Gateway: