Can't connect to Ubuntu 9.04 server

Can't connect to Ubuntu 9.04 server

I have installed Ubuntu 9.04 and am having a problem that I can connect from the server to the outside world but cannot connect to the server. I checked all of the different firewall systems (firestarter, ufw, iptables, etc.) and all are disabled. When I try to ssh, ping, etc. to the server they all timeout.