weird problem apache/ssh not responding on WAN
I have ISPconfig 2.0 setup with Debian 5.0 (Lenny) on my server. I have a two network card setup, which one network card is directly connected to the Net, while the second network card is hooked up on my internal lan.
I have this weird issue where the wan interface doesn't respond and crashes. I can't access the apache or ssh. I can access the web and SSH through the local lan interface, but not just the wan part of it. I used to just restart the wan interface and it would fix it but today, I tried to SSH into it via local LAN ip and it disconnects stating, "server unexpectedly closed the network connection." It gives the login prompt, when I enter the username, it hangs for a while then gives me that message.
I noticed in the logs that some people were trying to get it via ftp and SSH, but I installed fail2ban to temporarily ban them.
Does anyone know why my WAN interface keeps dying on me?