Looking at RFC1812, Martian packets [1] seems to be reserved addresses only. What you're talking about is referred to as source address validation [2] also kno

Looking at RFC1812, Martian packets [1] seems to be reserved addresses only. What you're talking about is referred to as source address validation [2] also known as strict reverse path forwarding (RPF) [3]. [1] https://datatracker.ietf.org/doc/html/rfc1812#section-5.3.7 https://datatracker.ietf.org/doc/html/rfc1812#section-5.3.7 [2] https://datatracker.ietf.org/doc/html/rfc1812#section-5.3.8 https://datatracker.ietf.org/doc/html/rfc1812#section-5.3.8 [3] https://datatracker.ietf.org/doc/html/rfc3704#section-2.2 https://datatracker.ietf.org/doc/html/rfc3704#section-2.2