Date: Thu, 7 Feb 2002 15:45:29 +0700 From: Eugene Grosbein <eugen@www.svzserv.kemerovo.su> To: stable@freebsd.org Subject: ipfw limit option Message-ID: <20020207154529.A92095@svzserv.kemerovo.su>
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Hi! I'm trying to utilize ipfw limit option with 4.5-STABLE. Till now I had stateless ipfw configuration that worked fine. Now I need to limit one of my TCP services with only 5 sessions per IP. The service itself has global limit of 50 simultaneous connections but cannot limit the number of connections per IP. And it is abused. I have following rules for the service bound to TCP port 8888: $fwcmd add 60130 pipe 3 tcp from $my_ip 8888 to any # for traffic shaping $fwcmd add 60135 allow tcp from any to $my_ip 8888 Now I changed rule 60135 to $fwcmd add 60135 allow tcp from any to $my_ip 8888 limit src-addr 5 This work basically, but: 1. Sometimes I see 8 connections per 1 ip, 6 are ESTABLESHED and 2 are CLOSE_WAIT. That does not bothers me too much but it shows: that code is not very exact. 2. The kernel fills my logs and console with TONS of messages: Feb 7 15:11:32 <kern.crit> www /kernel: OUCH! cannot remove rule, count 2 Feb 7 15:11:32 <kern.crit> www /kernel: drop session, too many entries Feb 7 15:11:32 <kern.crit> www last message repeated 3 times Feb 7 15:11:33 <kern.crit> www /kernel: OUCH! cannot remove rule, count 2 Feb 7 15:11:33 <kern.crit> www /kernel: drop session, too many entries Feb 7 15:11:34 <kern.crit> www last message repeated 80 times And so on. That's not what I expect to receive. How can 'drop session' messages be silenced? And what do 'OUCH!' messages mean? Eugene Grosbein To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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