Linux - NetworkingThis forum is for any issue related to networks or networking.
Routing, network cards, OSI, etc. Anything is fair game.
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I've set up a rate-limiting firewall option with iptables 22.214.171.124 and ipt_recent, today some Ip out there got themselves into 'jail' after a strange looking sequence downloading a single web page. They got about 80% of the page images when they started sending ACK FIN packets which were tossed by the firewall as invalid, then these events triggered the rate limiter (60 new packets in a minute) and they were placed into a ban list where everything is dropped, after about 20 packets they go quiet.
This is okay from my point of view except I wonder why the sequence went from normal request stream to ACK FINs?
To give an idea of the sifference in traffic, here's three different IPs download the same web page, the small number is packet count, the large number SRC port: