I'm looking for an anti sniff or a sniffer detection tool......the l0pht anti sniff is the fistone in apperas on a google search...
This site have a overview of AntiSniff by L0pht
http://www.securitysoftwaretech.com/antisniff/tech-paper.html
Also do check Neped It detects network cards on the network that are in promiscuous mode by exploiting a flaw in the ARP protocol, as implemented on Linux machines. (its a anti sniffer )
thanks killerserv, I'll check that.