TOSS 5 must not have unauthorized IP tunnels configured.

IP tunneling mechanisms can be used to bypass network filtering. If tunneling is required, it must be documented with the information system security officer (ISSO).

Verify TOSS 5 does not have unauthorized IP tunnels configured.

Determine if the "IPsec" service is active using the following command:

$ systemctl status ipsec

ipsec.service - Internet Key Exchange (IKE) Protocol Daemon for IPsec Loaded: loaded (/usr/lib/systemd/system/ipsec.service; disabled) Active: inactive (dead)

If the "IPsec" service is active, check for configured IPsec connections ("conn"), using the following command:

$ grep -rni conn /etc/ipsec.conf /etc/ipsec.d/ 

Verify any returned results are documented with the ISSO.

If the IPsec tunnels are active and not approved, this is a finding.

Remove all unapproved tunnels from the system or document them with the ISSO.