Re: Somewhat OT -- Looking for ideas on how to test status of SSH TCP tunnel
From: Gilboa Davara (gilboada_at_netvision.net.il)
Date: Fri, 04 Nov 2005 00:47:23 +0200 To: For users of Fedora Core releases <email@example.com>
I'd try vtund.
I use it to bridge my work "private" network to my home private network
(Sits on ADSL with dynamic IP and afraid.org name resolution)
It's secure (According the 2 different security reviews I read) stable
(I don't remember seeing it crash) and it handles the (re-)connection by
On Thu, 2005-11-03 at 12:53 -0800, Bruce McPeek wrote:
> I am planning on setting up a TCP tunnel through an SSH connection
> between our Korean office's intranet and our US office's intranet.
> This tunnel will be used to provide a connection between a Perforce
> Proxy server in Korea and our main Perforce server (Redhat 9) in the
> The OS for Korean proxy server will be Redhat FC3 using OpenSSH. I may
> have to give up this server at some point in the future and go Windows
> as the underlying OS, if that happens I would like to use Plink (from
> the maker of PuTTY
> I plan to set up the account used to connect our SSH server to a
> pretty restricted state; no login shell and port forwarding restricted
> to a specific ip:port.
> I am planning to script the SSH connection on the client side to
> reconnect should the connection drop. This should be a fairly trivial
> task. Unfortunately I have seen long running SSH tunnels in a state
> where they appear to be connected but no data flows through the tunnel
> or to the login shell. I would like test for this condition in my
> script but I am unsure which approach to take.
> I could conceivably try to connect through the tunnel to the server
> using some utility but which one? I could conceivable try using the
> Perforce client but would rather not consume a license to do this.
> Perhaps I could open have a second tunnel open just to test the
> connection, but what would be good to use?
> Best regards,
> Bruce McPeek
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