Jim Perrin wrote:
Along the lines of staying safe, now is probably a good time to check
your password policies.
1. Don't allow root access to ssh. (modify /etc/ssh/sshd_config)
why isn't this the default?
2. restrict root logins to only the local machine. (modify /etc/securetty)
3. Limit users with access to 'su' to the wheel group (use visudo and
also modify /etc/pam.d/su)
same question here.
4. Make sure root is the only one with a uid of 0. ( awk -F: '($3 ==
"0") {print}' /etc/passwd )
5. Use pam to require strong passwords. (install/use pam_passwdqc
which is part of the base distro, modify /etc/pam.d/system-auth )
6. Use denyhosts or pam.tally2 to restrict login attempts.
7. use ssh keys.
[snip]
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