[If you telnet to a unix system (port 23 by default), you are prompted
 to login with account name and password. If you mistype the name
 it will be logged to a system log (such as /var/adm/syslog, and if you
 mistype the passwd, it will indicate a failed login in the same
 log. When you successfully log in, your shell will often log all commands
 as a history. So what do we have here? She claims to have telneted
 to my system where she doesn't have an account, and to have left a
 message in my shell log. Uh, wrong. What she REALLY did was telnet to
 port 22 (the SSH port), and leave messages there. SSH will log all
 abnormal traffic for security reasons. Her messages were logged to
 /var/log/messages, not my "bash log". This is basic unix behaviour.]

Date: Wed, 4 Dec 1996 13:43:34 -0700
From: "Carolyn P. Meinel" 
To: jericho@dimensional.com
Subject: Re: HH: Re: Port surfing (fwd)

Damien, if you were to regularly read your bash log, you'd see that right
after you sent that silly squirrel message wherein you mistakenly thought I
had a current unm.edu account, I telnetted to lemming.com and left you a
message.