TCPDump Filter is a program that filters hex output from tcpdump, and converts it to ASCII and displays it on the screen.
You can download it from the following link: https://packetstormsecurity.com/files/download/10160/tcpdfilter_1.0a.tar.gz
Source: https://packetstormsecurity.com/files/10160/tcpdfilter_1.0a.tar.gz.html