Anytime a server has multiple network adapters, it can be problematic to make routing work correctly. Ensure that requests destined for the internal network are routed out the correct network adapter by using tools such as packet sniffers or traceroute. Packet capture tools have the capability to monitor a specific adapter, so it should be easy to determine whether traffic is flowing through an adapter. It is important to make sure you have properly configured Windows persistent routes. Use the
ROUTE PRINT command to verify routes on each of your Edge Servers.