Tcpdump, hunt, ipsniffing, Sniffit, Dsniff, ARP Sniffing, Wireshark, MAC Sniffing.
To detect sniffers
DNS reverse-lookups
ARP method
source-route method
decoy
latency
host
timedomain reflectometers
see hub lights
SNMP monitoring.
Tools to check sniffers
promiscan, antisniff, sentinel, neped
Prevent packet sniffing by using
VPNs, SSL, IPSec, OTPs, SSH, PGP, S/MIME
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