Hi,

I have a two-interface shorewall setup with one side on a 192.168.0.0
network while the other is connected to the Internet via a cable
modem.

There's a Win10 machine on the internal network that appears to be
sending out snmp requests to the network printer, and I can't
understand why shorewall is rejecting them.

Dec 20 19:50:43 orion kernel: Shorewall:FORWARD:REJECT:IN=eth1
OUT=eth1 MAC=0c:c4:7a:a9:18:df:52:54:00:52:6b:61:08:00
SRC=192.168.1.18 DST=192.168.1.104 LEN=106 TOS=0x00 PREC=0x00 TTL=127
ID=17640 PROTO=UDP SPT=50731 DPT=161 LEN=86

In my policy file I have allowed internal to internal communications:

int     int     ACCEPT

I've also checked to make sure there aren't any explicit rules to
block port 161 or snmp.

Does anyone have any idea what could be causing this, or how I can
troubleshoot it further? How do I identify which rule is causing this
to be rejected?

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