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Date: Fri, 27 Jan 2006 09:56:08 +0100
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: SSH Local Port Forwarding
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On Jan 26 16:53, Jon Dixon wrote:
>    I have Cygwin version 1.5.18-1 installed on a Windows 2003 Server
> System.  My question is in regard to the SSH Local Port Forwarding
> feature.  I activate the ssh local port forwarding with the command
> line statement:
> 
>    ssh ?L2001:server.com:23 server.com.
> 
> At this point, an application can connect to Cygwin listening on port
> 2001.   However if another program is executed and also listens on
> port 2001, it too will run.  Is there an option available where by SSH
> can open up the Local Port Forwarding listening port in exclusive mode
> (i.e. SO_EXCLUSIVEADDRUSE) so no other programs can simultaneously
> listen on the same port?

Unfortunately not.  WinSock behaves somewhat different than one would
expect in terms of port reuse.  I will look into this issue at some
later point, as time permits, and see if SO_EXCLUSIVEADDRUSE could help
here.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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