I have a program running on Ubuntu 11.10 64bit, which listens for clients on port 2468. I can successfully connect to this port with telnet on the local machine (with both localhost and the ip). I can also successfully connect to that port from a RHLE 4.0 computer. However, when I try to establish a connection from a windows xp machine on the same network, the command prompt clears itself and shows just a blinking cursor - like it connects but none of the "connected to *.*.*.*" shows up. As soon as i hit any key the connection drops and throws me back to a c:\ prompt. I did run netstat on Ubuntu while windows was in this quasi connected state and netstat did indicate that there was an established connection between ubuntu and windows.
I can ping the Ubuntu box fine from xp. I have ufw disabled, and I set all apparmor profiles to complain - none of this made any difference.
Any help is greatly appreciated, thanks.