Dan,
Having read the documentation I thought that this would be the default behaviour, but it's not. After some testing I have found that the connectivity I have got is very limited. From a client inside my network I have web access but no other access (ie only port 80). I can ssh to the server but not beyond. I cannot ping anything on the internet as the request times out (although it does resolve the DNS correctly). I can ping my external interface from the internet, but it is not receiving email or the webpage (they time out).
Any help with this would be appreciated. I have applied Update1 and 2 but I still have the same situation. I installed the server with default settings and everything is working fine. I can do admin from inside the network, and have successful test of connection to the internet.
Thanks,
Jonty