I have added some rules to my PREROUTING chain in NAT. Usually at the beginning of a new machine joining the network, these matches don't always match correctly?
Im using iptables v1.4.21 on OpenWRT Barrier Breaker This is on a linux bridge where ebtables is sending packets through iptables
In it's simplest form
-A PREROUTING -m mac --mac-source <my mac> -j ACCEPT -A PREROUTING -m limit --limit 1/min -j LOG --log-prefix "id=Unknown-Device " --log-level 5
But I get log messages showing that it didn't match. The mac addresses are definitely correct
id=Unknown-Device IN=br-lan OUT= PHYSIN=wlan0 MAC=<dst>:<src>:08:00 SRC=192.168.0.105 DST=188.8.131.52 LEN=64 TOS=0x00 PREC=0x00 TTL=64 ID=1 DF PROTO=TCP SPT=23058 DPT=80 WINDOW=8688 RES=0x00 SYN URGP=0