VULHUB ™

synsniff, as the name would imply, is a simple program which watches for the first part of a TCP connection (the SYN packet) and logs it. Optionally, synsniff can detect FIN (end of session) packets with no corrosponding SYN; this is useful for discovering stealth FIN scans. It is primarily a TCP connection logger but also includes some portscan detection heuristic. It logs incoming SYN and FIN packets to stdout, and also detects portscans by watching for multiple incoming connections within a short timeout (default threshold is 7 connections per second).

synsniff, as the name would imply, is a simple program which watches for the first part of a TCP connection (the SYN packet) and logs it. Optionally, synsniff can detect FIN (end of session) packets with no corrosponding SYN; this is useful for discovering stealth FIN scans. It is primarily a TCP connection logger but also includes some portscan detection heuristic. It logs incoming SYN and FIN packets to stdout, and also detects portscans by watching for multiple incoming connections within a short timeout (default threshold is 7 connections per second).