I'm begging anyone who is good at networking to help me fix my problem so I can MUD again. I've got two weeks off work and want to spend it killing some of my best friends (you guys).
Assuming Windows o/s
1) Run ipconfig. Do you have an ip address and default gateway?
2) Ping default gateway. Does it ping?
3) Try ipconfig /release and ipconfig /renew. If that does not solve your issue, your problem is likely in your home router or whatever device acts as your default gateway.
4) Find out what your public IP address is. Can you ping that? If not, you may have a NAT translation issue.
5) Ping 8.8.8.8. If not, the problem is likely something to do with your ISP not delivering a public ip address to your home router/default gateway device. In this case, you can try to login to your home router/default gateway device and release/renew your public interface (typically labeled as WAN).
6) Ping 206.72.201.199 (ginka.armageddon.org's ip address). Does it ping? If so, you have the ability to pass ICMP packets to ArmageddonMUD's server. If not, you may be being blocked by an access-list or firewall.
7) Try to telnet to 206.72.201.199. If it works, than you're good to go. Your problem is likely a DNS resolution error.
Cheers, hope that helps.