Hello,

I have a question about tunnels in putty.
What I want to do is to open a ssh session to PC A from PC B.
PC B should open a tunnel to PC C, which is in a network, which can
only accessed from PC B.
Since PC A can´t connect to PC B directly, PC B has to initialize the
connection. Is this possible?
A simple Remote Port tunnel does not solve this problem, if I understood
correctly.

That is how I think it should work:

guess
PC A is 192.168.1.2
PC B is 192.168.2.2
PC C is 192.168.3.2

PC B has as route to PC A and PC B. The firewall denies access to PC B from
192.168.1.0 but allows outgoing connections.

I need a connection on port 3690 to PC C.

If a connection from PC A to PC B would have been allowed, this would work:
ssh -L 3690:192.168.3.2 -l root 192.168.2.2 from PC A

So is there a chance to have an indirect tunnel?

Thanks for any advises
Stefan