The Photon operating system must configure Secure Shell (SSH) to restrict AllowTcpForwarding.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| medium | V-258883 | SRG-OS-000480-GPOS-00227 | PHTN-40-000220 | SV-258883r991589_rule | 2024-07-11 | 2 |
Description
While enabling 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 to verify the running configuration of sshd:
# sshd -T|&grep -i AllowTcpForwarding
Example result:
allowtcpforwarding no
If "AllowTcpForwarding" is not set to "no", 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