AIX must turn on SSH daemon reverse name checking.
An XCCDF Rule
Description
If reverse name checking is off, SSH may allow a remote attacker to circumvent security policies and attempt to or actually login from IP addresses that are not permitted to access resources.
- ID
- SV-215298r991589_rule
- Version
- AIX7-00-002115
- Severity
- Medium
- References
- Updated
Remediation Templates
A Manual Procedure
Edit the "/etc/sshd/sshd_config" file and add the following line:
VerifyReverseMapping yes
Restart the SSH daemon:
# stopsrc -s sshd
# startsrc -s sshd