QDPF was written to solve the problem of exposing internal services to the Internet. It runs on machines which bridge two networks and forwards TCP/IP packets from one to the other. Its main use is to expose corporate or Intranet services to the Internet, by running it on an intervening machine. TCP sessions can also be followed in detail using the 'trace' option. QDPF is a Java console application.
Any interest in an NT service version?
Is there any interest in a version of QDPF which runs as an NT service? This would be moderately difficult to do, but I believe it could be useful for those people running NT on the firwall.
I will make a start on this if anyone requires it. Drop me a mail if so.