Hi all, i know this is not strictly about netfilter, but here it goes: While I was deploying my firewall script, I noticed some weird traffic from mac ff:ff:ff:ff:ff:ff in my router's private interface. Later on I noticed the same traffic in other computers within the network. The traffic was arp who-has packets at a constant rate of about 35 kbytes/s. It's a /16 network in a switched environment. Thank you very much in advance. Best regards, Eduardo