[GUACAMOLE-1206] Unable to connect via SSH to Spectra Logic storage

• Type: Bug
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 1.2.0
• Component/s: SSH
• Environment: Ubuntu 20.04, docker 19.03.13, Guacamole 1.2.0
• Assignee: Unassigned
• Reporter: Luc Prefontaine
• Created: 02/Nov/20 20:10
• Updated: 03/Nov/20 02:04

Description

We have a Spectra Logic storage box here and the remote console uses SSH but with a restricted shell, not a standard shell (sh/bash/whatever). When attempting to connect, guacd stalls and never returns (or I wasn't patient enough to wait several minutes). This was working in 0.9.8. If I read correctly changes were made in 1.1.0 to interrogate the remote SSH server for stuff like the shell used, setting the TZ and locale.

All our old connections have been redone in the configuration and work seamlessly except this one.  SSH connections with 'normal' OpenSSH servers are working perfectly. Pretty sure that this new handshake is not working in this context. How should I investigate this and is there a way to revert to the old behavior ? 

Messages outputted by guacd:

guacd[6]: INFO: Creating new client for protocol "ssh"
guacd[6]: INFO: Connection ID is "$af567702-1461-451c-8238-c2f50fa16a01"
guacd[1876]: INFO:      User "@91f7ab2c-6970-4f40-a3bc-0640160da256" joined connection "$af567702-1461-451c-8238-c2f50fa16a01" (1 users now present)
guacd[1876]: WARNING:   No known host keys provided, host identity will not be verified.
guacd[1876]: WARNING:   Unsupported number of keyboard-interactive prompts: 0
guacd[1876]: WARNING:   Unable to set the timezone: SSH server refused to set "TZ" variable.
guacd[1876]: WARNING:   No known host keys provided, host identity will not be verified.
guacd[1876]: WARNING:   Unsupported number of keyboard-interactive prompts: 0