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https://issues.apache.org/jira/browse/GUACAMOLE-39?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15303405#comment-15303405
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Tyler Mauthe commented on GUACAMOLE-39:
---------------------------------------
The SFTP server on a system can become unresponsive for many reasons, while the
VNC connection remains available. In these cases, aborting the client is
inconvenient as you are unable to administer the system to fix the SFTP
connection.
This is especially true if the VNC connection provides access to the console,
via out-of-band management for example.
> If the VNC parameter enable-sftp is set to true but the SFTP server is not
> connectable, the system can not be accessed with VNC
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: GUACAMOLE-39
> URL: https://issues.apache.org/jira/browse/GUACAMOLE-39
> Project: Guacamole
> Issue Type: Bug
> Components: RDP, SSH, VNC
> Affects Versions: 0.9.9
> Reporter: Michael Jumper
>
> {panel:bgColor=#FFFFEE}
> *The description of this issue was copied from
> [GUAC-1509|https://glyptodon.org/jira/browse/GUAC-1509], an issue in the JIRA
> instance used by the Guacamole project prior to its acceptance into the
> Apache Incubator.*
> Comments, attachments, related issues, and history from prior to acceptance
> *have not been copied* and can be found instead at the original issue.
> {panel}
> If a connection is configured to have SFTP support for file transfers with
> VNC, and the SFTP server goes down or is not connectable for any reason, the
> system can not be accessed. The Home, Reconnect, Logout dialog is displayed.
> From the guacd log:
> {code:none}
> Mar 3 10:20:25 guacd-server guacd[18646]: Protocol "vnc" selected
> Mar 3 10:20:25 guacd-server guacd[18646]: Connection ID is
> "$7ee12ae4-2a1d-4d4a-994c-ea2a4c4f9c02"
> Mar 3 10:20:25 guacd-server guacd[18646]: VNC server supports protocol
> version 3.8 (viewer 3.8)
> Mar 3 10:20:25 guacd-server guacd[18646]: We have 1 security types to read
> Mar 3 10:20:25 guacd-server guacd[18646]: 0) Received security type 2
> Mar 3 10:20:25 guacd-server guacd[18646]: Selecting security type 2 (0/1 in
> the list)
> Mar 3 10:20:25 guacd-server guacd[18646]: Selected Security Scheme 2
> Mar 3 10:20:25 guacd-server guacd[18646]: VNC authentication succeeded
> Mar 3 10:20:25 guacd-server guacd[18646]: Desktop name "Windows8"
> Mar 3 10:20:25 guacd-server guacd[18646]: Connected to VNC server, using
> protocol version 3.8
> Mar 3 10:20:25 guacd-server guacd[18646]: VNC server default format:
> Mar 3 10:20:25 guacd-server guacd[18646]: 32 bits per pixel.
> Mar 3 10:20:25 guacd-server guacd[18646]: Least significant byte first in
> each pixel.
> Mar 3 10:20:25 guacd-server guacd[18646]: TRUE colour: max red 255 green
> 255 blue 255, shift red 16 green 8 blue 0
> Mar 3 10:20:28 guacd-server guacd[18646]: Unable to connect to any addresses.
> Mar 3 10:20:28 guacd-server guacd[18646]: Connection did not succeed
> {code}
> From the guacamole log:
> {code:none}
> 10:20:28.502 [http-bio-8081-exec-3] INFO
> o.g.g.net.basic.TunnelRequestService - User "admin" connected to connection
> "sftptest".
> 10:20:28.515 [http-bio-8081-exec-3] INFO
> o.g.g.net.basic.TunnelRequestService - User "admin" disconnected from
> connection "sftptest". Duration: 13 milliseconds
> {code}
> If the enable-sftp param is changed to false, or deleted, this connection
> succeeds.
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