Of course you can detect a sniffer, but are you willing to pay the cost of doing so? -- ----------------- \Management /\/| 216-686-0090 - PO Box 1480, Hudson, OH 44236 \ /\/ | Check out info-security heaven and test your system \/\ /\/ | for known vulnerabilities (1st time for free) at URL: \/Analytics| (scans deeper than SATAN or ISS) http://all.net:8080 ----------------- Read "Protection and Security on the Information Superhighway" John Wiley and Sons, 1995 ISBN 0-471-11389-1, 320 pp, $24.95