On Thu, 14 Jan 2021, [email protected] wrote:

On Thu, 14 Jan 2021, Tim Woodall via GLLUG wrote:

In

ssh -N -L 8080:webserver:80 gateway

Is there any way to specify which interface should be bound on gateway other than by changing the routing table on gateway?

I found
https://unix.stackexchange.com/questions/16057/use-ssh-with-a-specific-network-interface

And my ssh manpage has indeed got a -b to change the bind address on your initial outgoing connection and also -B to change bind interface. The rest about binding for the listening onb a fwd is indeed not helping your cause.

Ah I misunderstood. You want the machine called "gateway" to bind against a specific interface when doing the forwarding. I had assumed this to be done by your choice of IP in the portion before the first port the "webserver" being remote and the part you want to route out to but I think I can see the issue now. How do make sshd choose to use a particular binding for a host. I can't see a -b in man sshd but man sshd_config does have GatewayPorts. Otherwise route update or socat sound reasonable.

 - Damion

 - Damion

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