Troubleshooting

SecureCRT, like any other SSH client, can run into unexpected difficulties interacting with an SSH server. In this section we cover problems specific to SecureCRT. For more general problems, see also Chapter 12.

17.8.1 Authentication

Q:

When I try to upload my public key, I get the message, “Unable to open publickey subsystem” and the upload fails.

A:

SecureCRT can upload public keys only to SSH servers supporting the publickey subsystem, an open standard created by VanDyke. If you get this message, your remote server doesn’t have this support.

17.8.2 Forwarding

Q:

I can’t do port forwarding. I get a message that the port is already in use.

A:

Do you have another SecureCRT window open and connected with the same port-forwarding setup? You can’t have two connections forwarding the same local port. As a workaround, create a second session that duplicates the first, but with a different local port number. Now you can use both sessions simultaneously.

Get SSH, The Secure Shell: The Definitive Guide, 2nd Edition now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.