Friday, January 31, 2020

bridge with unexpected ping forwarding

I have a router-to-be with 4 NICs, on which ip-forwarding is not yet
enabled (and with OpenBSD 6.6).

One IF has an IP on one network segment and the three other IFs are
bridged together, with one of the three having an IP on another network
segment.

When I pinged the first IF, which should be alone on it's network
segment, from a machine connected to one of the three bridged together
IFs, I got a ping reply. I didn't expect it because forwarding is not
enabled.

What's going on here?

Am I missing something?

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