Linux RHEL-10-700650

Verify RHEL 10 SSH servers are configured to force frequent session key renegotiation with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*rekeylimit' /etc/ssh/sshd_config.d/10-stig.conf:RekeyLimit 1G 1h Verify the runtime setting with the following command: $ sudo sshd -T | grep -i rekeylimit rekeylimit 1073741824 3600 If the "RekeyLimit" keyword is not set to "1G 1h" in a drop-in that lexicographically precedes 50-redhat.conf, or if no output is returned, this is a finding.

Configure RHEL 10 to force a frequent session key renegotiation for SSH connections to the server. In "/etc/ssh/sshd_config.d", create a drop file that will lexicographically precede 50-redhat.conf and add the following line: RekeyLimit 1G 1h Restart the SSH daemon with the following command for the settings to take effect: $ sudo systemctl restart sshd.service