Securing Your Asterisk Server, Part 2 - page 3
Locking Down OpenSSH
If you're wondering why you can't just sit down at your Asterisk server to do all your command-line chores, the answer is you can. So, if you don't need SSH access, you should turn it off entirely. Use the
chkconfig command to do this:
# /sbin/chkconfig --del sshd
# /etc/init.d/sshd stop
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