We have a couple of internal networks that we route between, 10.9/16 and
10.246/16. But when I try to reply to ICMP requests coming into a 10.246
IP on the host from a machine with a 10.9 IP, I can't seem to do that. I
see the ICMP echo request packets in tcpdump, but I can't find anything
in iptables. It seems like they're dropped before they come into the
filter table.
Is there a way I can prevent this so that I can respond to traffic from
another non-publicly routable IP?
Thanks.
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