[no subject]

The "Host" line in ssh_config sets which of the following parameters (upto
the next "Host" line) should apply when conecting to hosts matching that
line. ie "Host *" at the top means that the following parameters apply when
connecting to any computer. More than one host can be given, and they can
use * and ? as wildcards in the same style of filename matching. They are
matched against the hostname given on the command line when starting ssh.

sshd_config doesn't have an option like you are thinking of, I guess you'd
set restrictions like that using lower level systems like ipchains. So
unless these lock you out, you're probably OK. In summary, it's as likely to
work as telnet, but I suggest you look at the right config file :o)

http://www.tac.eu.org/cgi-bin/man-cgi?sshd+8
http://www.tac.eu.org/cgi-bin/man-cgi?ssh+1

Cheers
Stephen