For quite some time it puzzles me why there are entries in the
firewall-log about blocking smtp connections coming in from my OPT
interface, where my access point is connected to. Most of the time there
is nothing using this accesspoint at all.
But shorty I began logging valid smtp accesses from the WAN too and now
I see that for some (not all?!?!) smtp accesses from the WAN there is a
corresponding one that seems to come from OPT.
The setup I use is: one network-card connected to a modem to the
internet provider. Another card directly connected to the LAN and the
third card connected to an accesspoint. The last one is brigded to the LAN.
It looks like this in the log:
21:38:49.235667 OPT 18.104.22.168, port 1966 192.168.77.253, port 25 TCP
21:38:49.233888 WAN 22.214.171.124, port 1966 192.168.77.253, port 25 TCP
Where the first line is being blocked and the second accepted, can
anyone explain why this happens?
Met vriendelijke groet,
There are some things so serious you have to laugh at them. - Niels Bohr