TCP health check behavior for server addresses configured as FQDN

FQDN in Server Address in Health Check Configuration

• SWG will do DNS query to get the IP addresses.
• If DNS query fails, SWG will consider the server as Unhealthy.
• If DNS returns single IP address, the behavior is same as that when an IP: Port is configured.
• If DNS returns multiple IP addresses:
  • If a single IP is found healthy, the Server is considered as healthy.
  • If the first IP is found unhealthy, then go to the next IP address in the list.
  • For each IP address, the logic for determining the health is the same as that when IP: Port is configured.

• During live traffic, SWG connects to healthy DNS-resolved IP. This avoids DNS queries for the live traffic.