SSH1 tunneling problems.

[Markus Friedl]

what does ssh -v say?
does it happen for ssh-2, too?

On Wed, Nov 22, 2000 at 09:20:58AM -0600, John Fulmer wrote:
> I've noticed this same problemm using local forwarding via OpenSSH in SSH1
> mode, both 2.3.0p1 and 2.2.0p1. The problem is that the tunnel (actually
> the entire ssh session) freezes periodically if the tunnel has several TCP
> connections initiated within a short period of time, and the ssh session
> must be broken and restarted.
> 
> The best example is if tunneling from a browser to a HTTP proxy server on
> the other end. I have the following in my ssh_config:
> 
> Host mull
> 	LocalForward 2143 skye:143
> 	LocalForward 2125 skye:25
> 	LocalForward 9119 skye:9119
> 	ForwardAgent no
> 	ForwardX11 no
> 
> 
> 'mull' is a gateway machine, while 'skye' is my e-mail/http proxy server.
> I connect to mull, and then point my browser to "localhost port 9119" for
> my HTTP proxy.
> 
> After an indeterminate amount of time, maybe 5 mintues, maybe an hour, the
> ssh session will freeze, usually after many 'endpoint not connected' error
> messages. The only appears to happen when using a locally forwarded port
> and only if that port is loaded by multiple connections.  This problem
> does not appear using SSH2, which is what I am happily using right now.
> 
> The client and server are Linux 2.2.17, although the server is a DEC Alpha
> running Redhat, while the client is i386. I have also experienced this
> with a i386 Linux server, running 2.2.14.
> 
> Thanks,
> 
> jf
> 
> 
>