The Photon operating system must configure sshd to restrict AllowTcpForwarding.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-256587 | SRG-OS-000480-GPOS-00227 | PHTN-30-000119 | SV-256587r991589_rule | 2024-12-16 | 1 |
Description
While enabling Transmission Control Protocol (TCP) tunnels is a valuable function of sshd, this feature is not appropriate for use on single-purpose appliances.
ℹ️ Check
At the command line, run the following command:
# sshd -T|&grep -i AllowTcpForwarding
Expected result:
allowtcpforwarding no
If the output does not match the expected result, this is a finding.
✔️ Fix
Navigate to and open:
/etc/ssh/sshd_config
Ensure the "AllowTcpForwarding" line is uncommented and set to the following:
AllowTcpForwarding no
At the command line, run the following command:
# systemctl restart sshd.service