An SBS2003 Std server that I manage has stopped providing Internet access to all of its client machines. The server itself can access the Web just fine, and there is also a site-to-site IPSEC VPN which is working as well. The client computers can also access the VPN. There is obviously something at the server end which I need to change to give Internet access back. I've run the SBS Internet Connection Wizard a few times, and the DHCP is set up in the usual way (Router/DNS Server/WINS Server are set to 192.168.10.1), the server's gateway is set to 192.168.1.250 which is the Draytek router. (I've also restarted the server to no avail)
The server is running on one network card so maybe there's some protocol or configuration missing here. Is there some sort of web proxy service needing reconfigured?
A point of note perhaps is that the server was formerly on two NIC's but I changed this to one and also changed the server's internal IP with the wizard; I manually updated the gateway, DNS and DHCP settings etc myself. But everything was running fine for a good number of days before this with no hiccups, so I don't think it's related to that. Also, client machines seem to be able to resolve remote domain names but just can't ping/access them. If you could give me a few pointers this would be appreciated.