I have run in to a problem while deploying Edge 2013 server. Edge has two NICs configured and they are in two different subnets. Edge Public IP is NATed to Edge external interface and entry is added in hosts file for front-end server.
As external user tries to sign-in, packet comes in through external firewall and it hits Edge external interface. Here is the exact problem. Edge fails to route the packet to front-end. Static route is configured to internal n/w and i can sign-in on to Lync
client from Edge server though.
However, if there is no NAT in picture (Edge connected to Public interface), traffic gets through and Lync client signs-in.
Anything to do with CU 5.0.8308 that's running ?