Date: Tue, 2 Jun 1998 12:04:53 -0700 (PDT) From: jason.axley@attws.com To: andrew@iaccess.com.au Cc: freebsd-questions@FreeBSD.ORG Subject: Re: closing TIME_WAIT connections??? Message-ID: <199806021904.MAA15227@invernes.nwest.attws.com> In-Reply-To: <00f401bd8db4$b75877e0$e34a05cb@alpine.iaccess>
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These aren't connections that are still open, they have been closed but
the local TCP sockets are in the TIME_WAIT state. This is a feature of
TCP implementations that keeps another application from opening the
same port too soon and possibly receiving packets that were destined
for the application that *used* to be connected to that port. The
length of time it takes for these to time out is TCP implementation
dependent and is usually around 2 minutes. They are nothing to worry
about!
The netstat manpage probably describes what the text in that column
means. Here's the entry from the Solaris netstat manpage:
TIME_WAIT Wait after close for remote shut-
down retransmission.
-Jason
On 2 Jun, Andrew Specht wrote:
> Hi,
>
> Is there a way to decrease the time connections stay open?
>
> For example, this is what i get with netstat -an:
>
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
> tcp 0 0 127.0.0.1.81 TIME_WAIT
> tcp 0 0 222.5.45.8.8080 TIME_WAIT
>
> There are hundreds of connections like that..
>
> Is there a way to close these after a specific amount of time, maybe in the
> kernel source?
>
> Thanks again
>
>
>
> Andrew Specht | System
> Administrator
> E-mail: andrew@iaccess.com.au | Internet Access Australia
> Internet: http://www.iaccess.com.au | Melbourne, Australia
>
>
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-questions" in the body of the message
--
-Jason
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