Eddie On Everything

VanDyke Secure CRT - bind: Permission Denied Error when connecting to Ubuntu SSH Server

April 12, 2008 on 5:56 pm | In linux, software |

When using Windows, I use VanDyke SecureCRT to connect to my Linux machines, which include servers running Red Had Enterprise Linux (RHEL), CentOS, and the Debian-derived Ubuntu. Everything was working fine until today.

Though I was playing around with the SSH configuration files to get SFTP transferred files to set a specific file permissions mask (umask), I don’t think I changed anything that would have caused this error:

“Connection to session XXXX failed: The server has disconnected with an error. Server message reads: A protocol error occurred. bind: Permission denied.”

“Connection to session XXXX failed: The server has disconnected with an error. Server message reads: A protocol error occurred. bind: Permission denied.”

The problem occurred on the Debian/Ubuntu based machine. Interestingly, the error only occurred when using SecureCRT - sftp via Sftpdrive worked great, and connecting to the machine via other SSH clients worked fine as well.

After trying everything I could think of, including changing authentication methods, user names, etc, and after much searching, I finally found a solution over in the HP forums:

Got it working. Fix is:
in SecureCRT

Options -> Global Options -> SSH2 Options

Turn off Option: Enable OpenSSH agent forwarding

Easy enough fix, but it took me about an hour to find the solution. If yo urun into the same problem, hopefully you’ll find this post much quicker than I found the HP solution.