Question; what is this netfilter logfile entry ?

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Nov 14 02:24:48 WF1-HOME kernel: DENY-OUT:.IN= OUT=eth0 SRC=192.168.1.2 DST=198.41.0.4 LEN=560 TOS=0x00 PREC=0xC0 TTL=64 ID=3123 PROTO=ICMP TYPE=3 CODE=3 [SRC=198.41.0.4 DST=192.168.1.2 LEN=532 TOS=0x00 PREC=0x00 TTL=49 ID=41159 PROTO=UDP SPT=53 DPT=51981 LEN=512 ]

It looks like ICMP with an embedded DNS call  ?.
What is it exactly, and how would a rule to allow this look like ?

Thanks in advance

Bo






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