Antisniff Unix Researchers (free) version 1-1-2 – This is a command line only version that runs many of the same tests to determine if a sniffer is running on the local network that the Windows NT/98/95 GUI does. Currently only Solaris and OpenBSD are supported.
You can download it from the following link: https://packetstormsecurity.com/files/download/21931/anti_sniff_researchv1-1-2.tar.gz
Source: https://packetstormsecurity.com/files/21931/anti_sniff_researchv1-1-2.tar.gz.html