Getting tons of "SFW2-INext-DROP-DEFLT" in dmesg!

Any idea what this is from? Can I just stop it by adding the line “mdns off” in /etc/hosts.conf? And if so, what could this break?

SFW2-INext-DROP-DEFLT IN=eth1 OUT= MAC=01:00:7b:00:20:04:b0:23:69:6c:3e:e5:04:00 SRC= DST= LEN=28 TOS=0x00 PREC=0x00 TTL=1 ID=0 DF PROTO=2

That’s firewall output. You can control the verbosity in YaST -> Security -> Firewall and set amount of logging there