Hello all, this is urgent and I appreciate the help!
I have SBS 2000 installed with ISA 2000 running. All my clients can get out to the internet and communicate with everyone else's machines on the internal network with no problems, i.e. server shares and printers, and everything is rosey as far as that's concerned.
The problem I am having is routing Outlook Internet Email through the Firewall to send and retreive email through an external provider on the client machines. I am also unable to ping or telnet to the pop servers on the external domain(internet) from the client machines. I have read numerous articles on this and created the IP Packet filters for ports 80, 25, 110, etc. to no avail. The server itself has no problems with connecting to the pop and smtp servers via outlook or telnet.
Now I'm leaning towards maybe my DNS setup for the private network might not be correct. If it's not the DNS can someone help? I have listed the setup below in the order of connections, can anyone tell me what's wrong? The SBS contains two NICs, one for external, one for internal and the SBS is also functioning as the DNS for the internal domain.
ISP Cable Router
External Network Card on SBS Server Configured with ISP Static Address, subnet, gateway and DNS Servers
Internal Network Card on SBS Server Configured with:
If everything looks ok, can someone please guide me further, my clients need this access ASAP.