From: marty <martinbarrowcliff@gmail.com>
To: netfilter-devel@vger.kernel.org
Subject: latency increased X 10 on update
Date: Fri, 25 Nov 2011 16:45:54 -0500 [thread overview]
Message-ID: <4ED00C92.9030701@gmail.com> (raw)
Using ipset-6.9.1 on Linux-3.1.1
Only managing ipv4 traffic on Intel Atom-330 firewall.
Same iptables rules, however after updating from v4 code I see issues.
Attacker sends a packet;
I detect a unserved dest port and --add-set Blah src;
LOG it, DROP it, and begone;
But the set may not match for several further packets.
Ouch. Buffers?
Blah is used as
iptables -t raw -I PREROUTING --match-set Blah src-j DROP
This DROP is NEVER logged, but certainly counted.
However I often continue to log multiple packets from blocked hosts,
despite I am supposedly blocking them on the first bad packet.
I can confirm they are in the set but when packet_count exceeds 1
something is very wrong with that picture.
Marty B.
next reply other threads:[~2011-11-25 21:46 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-25 21:45 marty [this message]
2011-11-25 23:04 ` latency increased X 10 on update Jozsef Kadlecsik
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