Applications to build a firewall, similar to TIS FWTK

Hello, I have been trying to build a Firewall with the TIS FWTK, but I think that it doesn't work properly with the last versions of SUSE Linux (maybe it's too old) It's any program similar than FWTK? It's to make a work for the University, so I need an application that provides FTP, TELNET, and HTTP proxies and with open source code. Could anybody help me.? It's my last exam to finish my studies. Thank you very much, and sorry for my English :-D Torres.