Hi.
How does netfilter decide which in/out-interface a packet has? I mean
the following:
Image I have a host with the following interfaces and addresses:
lo: 127.x.x.x and :1/128
eth0: 88.88.88.88
99.99.99.99 is a remote address (packets come in via eth0)
Now consider the following cases (source --> destination):
"internal traffic":
127.x.x.x --> 127.x.x.x => quite clear, in=lo out=lo
127.x.x.x --> 88.88.88.88 => in=??? out=???
88.88.88.88 --> 88.88.88.88 => in=??? out=???
88.88.88.88 --> 127.x.x.x => in=??? out=???
"incoming traffic (from remote):
99.99.99.99 --> 127.x.x.x => is that possible at all? how would
the in=/out= be?
99.99.99.99 --> 88.88.88.88 => quite clear, in=eth0 out=n/a
"outgoing traffic (to remote):
127.x.x.x --> 99.99.99.99 => is that possible at all? how would
the in=/out= be?
88.88.88.88 --> 99.99.99.99 => quite clear, in=n/a out=eth0
Thanks,
Chris.
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