Linksys e1000 v2.1
Tomato v1.28.0000 MIPSR2-138 K26 Mini
VLan 9 has a linux pc(tagged) and a noisy device(untagged)
vlan 10 has the linux pc (tagged) and the br0 interface
the noisy device spams ARP requests, HARD, and udp data, alternating between 0 length, and 1316
I am trying to drop all the ARP and 0 length UDP packets, but all rules that I had seem to do nothing.
I am SSH'ing into the router
The rule I am trying to add is
iptables -t raw -A PREROUTING -p udp -m length —length 28 -j DROP
I also did modprobe xt_length first
on the linux PC i still see all the 0 length UDP packets in TCPdump
so then I tried
iptables -A FORWARD -p udp -j DROP
I still see all UDP traffic on the linux PC, is there something obvious I am missing here?