* * * * * Everything you wanted to know … I found Dan Berstein's [1] website via a Slashdot discussion [2] on exploits. His site has a lot of good technical information about the various TCP/IP protocols like SMTP, FTP and DNS. It's worth reading. [1] http://cr.yp.to/ [2] http://slashdot.org/comments.pl?sid=00/06/02/1253259&cid=127 Email Sean Conner at sean@conman.org .