How to view iptables logs of message sent from devices on same network?

Installing and Using OpenWrt
1

Hi all,

This might be a very stupid question but where can I view the logs of iptables rules?

I created a rule like -

iptables −t raw −A PREROUTING −d ip −j LOG

to log packets going towards to that ip address.

I am sending packets from one of my devices to this ip and want to see the logged messages like in Tcpdump.
I don't see any records of any packets whereas I see them in tcpdump.

What am I doing wrong and where can I find the logs?

2

Did you check in dmesg and they are not there?

3

I found the problem.

I am sending packets from a wireless client to a wired client (which I suppose are on the same interface - br-lan). Apparently they are not logged. I can see traffic from the WAN side to LAN side and vice versa but I am not able to capture internal wireless LAN<>LAN wired traffic. Do you have any idea on how to achieve this?

4

In this case you'd need ebtables.

5

Okay. Can you tell me how to use them?

6

They are quite similar to iptables.
https://ebtables.netfilter.org/misc/ebtables-man.html

1 Like