OVALFileLinker from SCAP Security Guide ssg: [0, 1, 80], python: 3.10.12 5.11.2 2026-01-26T22:10:23 Ensure Mail Transfer Agent is not Listening on any non-loopback Address Ubuntu 22.04 Verify MTA is not listening on any non-loopback address tcp 127.0.0.1 25 oval:ssg-ste_not_port_25:ste:1 oval:ssg-ste_not_on_localhost:ste:1 tcp 127.0.0.1 465 oval:ssg-ste_not_port_465:ste:1 oval:ssg-ste_not_on_localhost:ste:1 tcp 127.0.0.1 587 oval:ssg-ste_not_port_587:ste:1 oval:ssg-ste_not_on_localhost:ste:1 ::1 25 465 587