> trying to connect from 9atom via ssh (v2) to my linux machine I get: > > ssh: dial: handshake failed > > What should I check that might have gone wrong? > (The machine is otherwise accessible from other systems via > ssh.)
The first thing to check is whether the Linux box is configured to do password auth or just "keyboard interactive" auth. It seems that OpenSSH these days defaults to having real password auth turned off, but keyboard interactive turned on. It's usually implemented so that it looks the same to the end user, but the protocol is different. The SSHv2 implementation does not currently support keyboard interactive. Having said that, I seem to remember that the handshake failed error actually occurs before you get to the auth stage. It's very early in the negotiation when the two sides exchange identities and supported versions. It's possible to run the tunnel with debugging turned on and see what is being exchanged and what is being complained about. Similarly, you might look at logs on the Linux side to see if there's something it's complaining about. BLS
