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Okay, so I have one machine with this config:

net.ipv4.conf.all.log_martians = 0
net.ipv4.conf.default.log_martians = 0

And, after a sysctl -p, it stopped flooding the /var/log/messages (as it should).

But I have this other machine, with an sdiff sysctl, identical to the first machine, that keeps flooding the /var/log/messages with the martian source warnings.

I had to do this

net.ipv4.conf.all.log_martians = 0
net.ipv4.conf.default.log_martians = 0
net.ipv4.conf.eth0.log_martians = 0
net.ipv4.conf.eth1.log_martians = 0

in order to stop the messages from appearing.

And I can't really understand why it needed the additional specific .ethx lines.

Any help would be most welcome.

U880D
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Alan Mackey
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  • Does both machines have two (2) network interfaces like `eth0` and `eth1`? Or only the second one? Do you have more information regarding both (system, setup, versions, etc.)? – U880D Jun 14 '23 at 08:41
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    Sorry, I didn't see this earlier. After a clean reboot, the messages disappeared. – Alan Mackey Jul 06 '23 at 09:51

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