I am using PPPoE connection as gateway. Recently i discovered that bandwidth from my Ethernet and PPPoE that is on that interface have difference for 10-20 Mbps and much more. I used Torch to see all connections i and found several incoming connections on 47 protocol (gre) that has source and destination ip address from some local subnet which i am not using. I suppose this connections are from my ISP as i see a lot of connections for “discovery”.
I have tried to drop this packets but firewall isn’t picking them at all on input or forward chain. Image from Torch is attached.
How can i get rid of those packets to free up my bandwidth?
You can’t get rid of packets arriving at your WAN interface, ISP could.
If packets are not targeting router’s own IP address and firewall filter blocks them in forward rule (even if in-interface is same as out-interface, default rules are fine), then router will silently ignore those packets. The discovery packets are broadcast and it’s somehow expected to see them … although in routed environment (PPPoE can and should be one) broadcasts shouldn’t be flying around just like that.
If bandwidth consumption bothers you, then complain to your ISP … and be ready to be ignored
