Re: Filtering on Ether type, not port

Thank you Ruth.

On Wednesday, 2 March 2022 15:29:50 GMT Ruth Ivimey-Cook wrote:
> I wouldn't bother trying to filter on type, just filter on either FB's
> (Mac or IP) address (and possibly dest IP) + port as well.

SW on my LAN server is dropping all incoming packets to port 80, which in this 
case just pollutes the log.

> However, first I would check the manual for the FB and visit the FB
> support to ask how to ask it to stop.

FB just tell me to consult the firewall maker on how to accept EtherType 
0x88e1. That's why I asked here.

> FB have a decent rep and I would be surprised if the behaviour had no useful
> purpose.

Yes, the FB is looking for other web-capable hosts to include in its mesh 
setup. The EtherType 88e1 is looking for Fritz power-line adapters. I don't 
know why these probes only go to the LAN server, not the workstations.

Should I be nervous about opening port 80 to the FB? Won't that just allow 
packets in from the Internet?

-- 
Regards,
Peter.