ethereal: Ethereal ethereal: ethereal: Ethereal is a GTK network traffic analyzer, or "sniffer". The Ethereal ethereal: distribution also comes with Tethereal, which is a line-oriented sniffer ethereal: (similar to Sun's snoop, or tcpdump) that uses the same dissection, ethereal: capture-file reading and writing, and packet filtering code as Ethereal, ethereal: and with editcap, which is a program to read capture files and write the ethereal: packets from that capture file, possibly in a different capture file format, ethereal: and with some packets possibly removed from the capture. ethereal: