It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

Whenever I try to play online it states that I must have windows 95 to play. I am running it on Vista. How do I get around this to play online?
This question / problem has been solved by McDondoimage
I will check it in the morning at work but you should have Duken Nukem 3D\Network\Host and Client programs in the Menu Start that fixes IPC for you. Clients will needs to input IP of HOST and everything should work.
Please go to Menu Start\Duke Nukem 3d\Network\Start HOST game
HOST then gives his IP number to other players
Other players needs to choose Menu Start\Duke Nukem 3d\Network\Start CLIENT game
then you should write in DosBox window CONNECT hoist.ip.number.here
this open IPX tuneling and connects all the players, also all of the players needs to choose this same no of players for game.