TMG ForeFront 2010 Cannot Ping/Be Pinged
Posted on 2013-10-23
A couple of days ago, during a windows update, our TMG 2010 server froze trying to install service pack 1. So we aborted the install (and in Windows updates it shows as "failed"). At the same time, we lost all connectivity to the internet.
Having reset a number of things, even to the point of re-entering the static routes, we still cannot get TMG to play on the network.
The TMG server sits in it's own IP range, and in it's own VLAN. It is a physical server, with an NIC for the internal network, and a NIC for the external network (which connects into a CISCO router provided by Virgin Media).
The network consists of a number of VLANS (10 for servers, 50,51,52 for the 3 floors of the building, 100 for the border LAN). Whilst I can ping the TMG server from the VLAN 50 for example, I cannot ping it from VLAN 10. The TMG server cannot ping any IP address either.
We've not changed any configuration of the VLANs, so I am at a loss to understand why all of a sudden TMG has gone wayward. More to the point, how to fix it.