Ethereal is a GTK+-based network protocol analyzer, or sniffer, that lets you capture and interactively browse the contents of network frames. The goal of the project is to create a commercial-quality analyzer for Unix and to give Ethereal features that are missing from closed-source sniffers. Screenshot available here.
You can download it from the following link: https://packetstormsecurity.com/files/download/42574/ethereal-0.10.14.tar.gz
Source: https://packetstormsecurity.com/files/42574/ethereal-0.10.14.tar.gz.html