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Date:      Fri, 11 May 2012 15:09:22 -0600
From:      "Chad Leigh Shire.Net LLC" <chad@shire.net>
To:        FreeBSD Mailing List <freebsd-questions@freebsd.org>
Subject:   question on SYN_SENT 
Message-ID:  <D8AF0C20-E2C0-44A4-89DF-B614F3DBBFF6@shire.net>

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it is my understanding that SYN_SENT is when MY SIDE sends out a request =
and is awaiting a reply?

One of the jails we run for a customer had hundreds (if not thousands) =
of attempts to connect from the 147. address you see below.   It was =
exhausting resources so that new tcp connections could not be made until =
some closed.

I added that address to a "pf" block statement to stop it but now we get =
a rolling connections in a "netstat -a" as show below (host. being a =
generic name used in place of actual host on our side).   I am wondering =
if this shows something on our side trying to connect out?  That is what =
it appears to me to be, which does not  make sense.


tcp4       0      0 host.52562         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52561         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52560         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52559         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52558         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52557         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52556         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52555         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52554         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52553         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52552         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52551         147.237.76.155.http    SYN_SENT
tcp4       0      0 host.52550         147.237.76.155.http    SYN_SENT



thanks
Chad




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