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by denton-scratch
1133 days ago
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Yeah, but I think that WP page is wrong. It relies on the page Reserved_IP_addresses, implying that a martian is a packet with a source address within certain ranges. In fact a martian is a packet with a source address for which the receiving interface isn't configured; any address could be a martian, depending on how the interface is set up. Hey, if I'm wrong, please set me straight. |
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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
[2] https://datatracker.ietf.org/doc/html/rfc1812#section-5.3.8
[3] https://datatracker.ietf.org/doc/html/rfc3704#section-2.2