I run iptables-save and backup my iptables rules in git. I recently noticed that 2 new tables popped up, mangle and nat, and I was not able to delete those tables. (perhaps an update to iptables added this).
I would like to understand why these tables' chains have ranges and what those ranges mean. i.e
:PREROUTING ACCEPT [1344:400539]. I'm not sure what 1344:400539 indicate.
When I run iptables-save, i get the following output
*mangle :PREROUTING ACCEPT [1344:400539] :INPUT ACCEPT [1344:400539] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [986:220524] :POSTROUTING ACCEPT [986:220524] COMMIT