The AIX SSH daemon must be configured for IP filtering.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-215295 | SRG-OS-000480-GPOS-00227 | AIX7-00-002112 | SV-215295r1009551_rule | 2026-02-06 | 3 |
Description
The SSH daemon must be configured for IP filtering to provide a layered defense against connection attempts from unauthorized addresses.
ℹ️ Check
Note: If the installed version of OpenSSH is 6.7 or above, this requirement is not applicable.
Check the TCP wrappers configuration files to determine if SSHD is configured to use TCP wrappers using commands:
# grep sshd /etc/hosts.deny
sshd : ALL
# grep sshd /etc/hosts.allow
sshd : 10.10.20.*
If no entries are returned, the TCP wrappers are not configured for SSHD, this is a finding.
✔️ Fix
Add appropriate IP restrictions for SSH to the "/etc/hosts.deny" and/or "/etc/hosts.allow" files.
TCP Wrappers can be installed from the AIX Expansion Pack by installing fileset "netsec.options.tcpwrappers" using the following command (assume AIX Expansion Pack is mounted on /dev/cd0):
# installp -aXYgd /dev/cd0 -e /tmp/install.log netsec.options.tcpwrappers