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From Carter Sema <>
Subject Re: Guacamole Dropping Connections
Date Thu, 12 Oct 2017 23:34:50 GMT
Turns out, my DNS wasn't set on my eth0 adapter. Since I use DNS names to connect, it couldn't
resolve. Thanks for your help!

Get Outlook for iOS<>
From: Carter Sema <>
Sent: Thursday, October 12, 2017 3:16:20 PM
Subject: RE: Guacamole Dropping Connections

Check /var/log/messages or journalctl = see screenshot attached. This is all I have under
/var/log. My Distro is Ubuntu Server 16.04. Any other locations where those guacd logs might

Carter Sema
Network Support Specialist<>

From: Nick Couchman []
Sent: Thursday, October 12, 2017 2:40 PM
Subject: Re: Guacamole Dropping Connections

On Thu, Oct 12, 2017 at 2:33 PM, Carter Sema <<>>
OK! That seemed to work… But now there another error.
When trying to connect to a machine it says “
The remote desktop server is currently unreachable. If the problem persists, please notify
your system administrator, or check your system logs.”

And catalina.out says-
“Thu Oct 12 14:19:21 EDT 2017 WARN: Establishing SSL connection without server's identity
verification is not recommended. According to MySQL 5.5.45+, 5.6.26+ and 5.7.6+ requirements
SSL connection must be established by default if explicit option isn't set. For compliance
with existing applications not using SSL the verifyServerCertificate property is set to 'false'.
You need either to explicitly disable SSL by setting useSSL=false, or set useSSL=true and
provide truststore for server certificate verification.

I don’t think the SQL error is causing the problem, but I might be wrong..

Check /var/log/messages or journalctl, depending on your Linux distro, to see what the error
is from guacd.  The catalina.out file will tell you the errors for the gaucamole-client stuff,
but the error you're getting seems to be coming from the guacamole-server side, when it tries
to make the connection via RDP.

One thing I've noticed in my experience with Guacamole + RDP - if you're using Windows 8 or
newer or Windows 2012 or newer, NLA is required by default.  If you've saved your username/password
in Guacamole and have turned on NLA, this will work - otherwise, if you have not saved your
credentials, and/or not enabled NLA, you might receive that error message.  You'll either
need to relax Windows' restrictions on RDP connections such that you can connect with older
RDP clients, or you'll need to save your credentials in the connection info.  The other option
is to log in to Guacamole with the same credentials you'd use to connect to Windows (enable
LDAP authentication module, or set your username/password the same) and then use the ${GUAC_USERNAME}
and ${GUAC_PASSWORD} tokens to pass the authentication information through.  Hopefully at
some point we'll get parameter prompting into the Guacamole Client, which will allow for the
preferred combination: Use NLA, don't save credentials, but allow user to enter credentials
at connection time.  Again, not sure if that's what you're running into, but it could be.


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