AIX must turn on SSH daemon reverse name checking.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215298 | SRG-OS-000480-GPOS-00227 | AIX7-00-002115 | SV-215298r991589_rule | 2024-08-16 | 3 |
| 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. |
| ℹ️ Check |
|---|
| Check the SSH daemon configuration for the "VerifyReverseMapping" setting using command: # grep -i VerifyReverseMapping /etc/ssh/sshd_config | grep -v '^#' VerifyReverseMapping yes If the setting is not present or the setting is "no", this is a finding. |
| ✔️ Fix |
|---|
| Edit the "/etc/sshd/sshd_config" file and add the following line: VerifyReverseMapping yes Restart the SSH daemon: # stopsrc -s sshd # startsrc -s sshd |