borries
We have an ADSL line that connects to the router with an IP address of 192.168.0.100. When I want to test the internet connection from the SME server console the connection fails all the time. The server is set to server only mode and I have set the default gateway to 192.168.0.100 and the dns address to that of the ADSL router but the internet is not working directly from the server.
I think you should resolve the lack of Internet access first.
Try restarting your router, and check if any changes were made to it, or if your ISP made any changes.
Check your cabling between server and router.
When the server can access the Internet again, then start troubleshooting your dansguardian login issues, if they are still happening.