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Date:      Thu, 18 Jul 2002 15:00:47 -0700 (PDT)
From:      Benjamin Franks <benjamin@dzhan.com>
To:        <freebsd-questions@freebsd.org>
Subject:   tcp SYN retries?
Message-ID:  <20020718145818.M46100-100000@crimea.dzhan.com>

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When I attempt to make a sock_stream connection to an IP, and DON'T
receive an ACK or RST response, it seems that the system retries a finite
number of times by sending additional SYN packets.  There also looks to be
a 3 or 6 second delay between SYN retries.  After four or five, the
connection fails.

Is there a way I can change the interval time for SYN retries, or decrease
the number of times it retries?  I would imagine this would be dependent
on the particular tcp/ip stack implementation of my OS.  I'm using FreeBSD
and would imaging some kernel sysctl variable would control this...  Any
ideas?  Or perhaps it's a socket option?

Thanks!
--Ben



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