login about faq

I'm getting a "Bad Failure Packet" message try to ssh to an APC SNMP Card AP9631 Goes on the say "A Protocol Error was detected" Any thoughts?

asked Mar 11 '10 at 17:01

Steve's gravatar image


Can you show the output of the ssh connection using the -v (verbose) argument? This might give more information about the reason for the failure to connect. Such as: ssh -v user@

(Mar 11 '10 at 17:19) Roman ♦♦ Roman's gravatar image

Could this card be running version 1 of the SSH protocol ?

If that's the case Tectia does not anymore support version 1 of the SSH protocol as it is insecure. Only the SSH2 protocol is supported.

This can be checked by for example running telnet against the port where SSH is running, such as:

telnet <ip address of the card> 22

What is the output of this command?


answered Mar 11 '10 at 17:13

Roman's gravatar image

Roman ♦♦

Grepping through the source code, this error message is present only in Tectia Client 4.x and older.

The error message appears to be triggered when server (running on your AP9631 card) sends an SSH_MSG_USERAUTH_FAILURE message (indicating that authentication failed), but the contents of the message don't match what Tectia Client expects.

You may have better luck with a different version of Tectia Client (I'd suggest trying with 6.1) or perhaps OpenSSH.


answered Mar 11 '10 at 17:50

Ville%20Laurikari's gravatar image

Ville Laurikari

Your answer
toggle preview

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here



Answers and Comments

Markdown Basics

  • *italic* or __italic__
  • **bold** or __bold__
  • link:[text](http://url.com/ "title")
  • image?![alt text](/path/img.jpg "title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported



Asked: Mar 11 '10 at 17:01

Seen: 6,495 times

Last updated: Mar 25 '11 at 10:22

All user contributed content licensed under the cc-by-sa license.
Powered by OSQA.