submitted 2 years ago* (last edited 2 years ago) by to c/linux@lemmy.ml
 

Hi,

On my Debian 12 Bookworm ( raspberry pi )

My nftables do not block DHCP packets ! according to this basic rules

nft -y list rulesset

table ip Tip {

	chain chIN {
		type filter hook input priority 0; policy drop;
		ct state established,related accept
	}
	chain chFW {
		type filter hook forward priority 0; policy drop;
	}
	chain chOUT {
		type filter hook output priority 0; policy drop;
		udp dport 67 drop #DHCP
		udp dport 53 accept
		tcp dport { 80, 443} accept
		ct state established,related accept
	}

}

DHCP should be blocked... but it's not as I get an IP from it..

Any ideas ?

Thanks.

you are viewing a single comment's thread
view the rest of the comments
[–] [S] 1 point 2 years ago

Obviously, but I'm anyway wondering why it doesn't blocking like it should
I hope nftables do not let other pass like this...

  • source
  • parent