Pre-login text appears at the start of your telnet session. It looks something
FreeBSD (ns.freebsd.nz.eu.org) (ttyp2)
You can then enter your user id and password. Please don't confuse this with the
post-login text, otherwise known as the Message Of The Day (motd).
You will notice that the message contains information about the operating system and
the terminal. It is considered by some that such information should not be given
out. If someone is scanning IP addresses for a telnet prompt, if they know the type
of system they've found, then they're that much further ahead. I've recently changed
my system so that this information is not given out.
This topic started when Rzzo (Baris D. Bal) on #freebsd undernet said he was looking to
change the pre-login text. I searched the mailing list archives and found the information
and passed it to him. He got it to work but I couldn't. Eventually, we figured
out what was wrong.
There are two ways to do this. You can either change
the banner or you can disable the banner.