I recently needed to change our static public IP address for our domain so our network could use a new fibre link rather than an older slower copper one. Our Exchange server 2010 on an SBS 2011 DC had worked and run OWA fine until the change-over. Now my users can't log in remotely athough OWA works fine internally.
I also changed the router from a Netgear FVS318 to a Cisco-branded Lynksys RV042 for a VPN to a branch office and have forwarded both ports 80 & 443 on the router to the Exchange server but externally only port 443 appears to be open and traffic can't pass through 80 to the server. Our ISP has confirmed they are not blocking port 80 and I can telnet the server on 80 from the internal network.
Looking at the IIS Manager i notice that there is a question mark over the globe for 'Default Web Site' and there doesn't seem to be a clue as to what the ? mark is referring to.
Would the server be blocking access via HTTP to port 80 from the router? Could there be an issue with the bidings. Or could I have a fault with the router?