Configuring the WSM using Device Manager

Link health checking

You can check the health of an Intrusion Detection Server (IDS) by configuring link health checks. An IDS often has two physical interfaces--one to detect intrusions, and one to generate logging. The first interface detects intrusions but since it does not have TCP/IP stack, it can only support Layer 1 (physical) health checking. As long as the physical link between the WSM and the IDS is up, it indicates the IDS is alive.

To enable link health checking, choose Link from the real server group health check selection list. See Configuring a health check for a real server group. The real server number determines which port the server is connected to. For example, real server 1 is assumed to be connected to port 1. The valid IDS real server numbers are from 1 to 9 when health check is in use. The server is considered to be up when the link is present and the server is considered to be down when the link is absent.

See also:

• Intrusion Detection server load balancing
• How Intrusion Detection SLB works
• Configuring Intrusion Detection server load balancing
• Detecting SYN attacks
• Using delayed binding to prevent DoS attacks
• Direct server return health checking
• ICMP health checking
• ARP health checking
• TCP health checking
• Script-based health checking
• Modifying the health check interval and retries
• Application health checking
• About health checking