Herouth Maoz wrote:
What you are saying is basically that I should just ignore these messages. This is annoying, though, because if someone attempts to spoof an address (which is what the martian messages are meant to reveal), I'll never be able to see the attempt through all the background noise.On the PPP interface, you cannot detect spoofed messages with this method, since any IP coming from the Internet is legit.
On the ETH interface, the cable company's router (CMTS) protects you from spoofing by employing techniques like "source-verify":
http://www.cisco.com/en/US/tech/tk86/tk803/technologies_tech_note09186a00800a7828.shtml
All in all, you have nothing to worry about.
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