X2Go Bug report logs - #915
GSSAPI Auth Bug

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Package: x2goclient; Maintainer for x2goclient is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goclient is src:x2goclient.

Reported by: Lukas Koschmieder <koschmieder@gmx.net>

Date: Thu, 6 Aug 2015 23:40:01 UTC

Severity: normal

Found in version 4.0.4.0

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Report forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#915; Package x2goclient. (Thu, 06 Aug 2015 23:40:01 GMT) (full text, mbox, link).


Acknowledgement sent to Lukas Koschmieder <koschmieder@gmx.net>:
New Bug report received and forwarded. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Thu, 06 Aug 2015 23:40:02 GMT) (full text, mbox, link).


Message #5 received at submit@bugs.x2go.org (full text, mbox, reply):

From: Lukas Koschmieder <koschmieder@gmx.net>
To: submit@bugs.x2go.org
Subject: GSSAPI Auth Bug
Date: Fri, 07 Aug 2015 01:37:55 +0200
[Message part 1 (text/plain, inline)]
Package: x2goclient
Version: 4.0.4.0

Hi,

I'm not sure if this is a server-side or client-side bug but each new
user who tries to connect to my X2Go server initially receives the
following error message: "Check your GSSAPI configuration or choose
another authentication method." I have noticed that this error
disappears as soon as a user establishes his first SSH connection to my
X2Go server (using PuTTY).

Regards,
Lukas


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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#915; Package x2goclient. (Tue, 11 Aug 2015 17:25:02 GMT) (full text, mbox, link).


Acknowledgement sent to Mihai Moldovan <ionic@ionic.de>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Tue, 11 Aug 2015 17:25:02 GMT) (full text, mbox, link).


Message #10 received at 915@bugs.x2go.org (full text, mbox, reply):

From: Mihai Moldovan <ionic@ionic.de>
To: Lukas Koschmieder <koschmieder@gmx.net>, 915@bugs.x2go.org
Subject: Re: [X2Go-Dev] GSSAPI Auth Bug
Date: Tue, 11 Aug 2015 19:21:38 +0200
[Message part 1 (text/plain, inline)]
On 07.08.2015 01:37 AM, Lukas Koschmieder wrote:
> Package: x2goclient
> Version: 4.0.4.0

Please try upgrading to 4.0.5.0.

I have fixed a few bugs regarding GSSAPI/Kerberos in that version - maybe that
already solves your problem.


> I have noticed that this error
> disappears as soon as a user establishes his first SSH connection to my
> X2Go server (using PuTTY).

Additionally, this might not be a bug at all.

X2Go Client expects a valid Kerberos ticket to be available. Typically, Windows
users that use Kerberos already get a ticket at login time via AD or the like.

If that is not true for your setup, you will have to request a new ticket
manually the first time after login - and are responsible to also keep it from
expiring (e.g., via periodically requesting a new ticket or requesting a
renewable ticket and running the renew command every now and then.)



Mihai

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Information forwarded to x2go-dev@lists.x2go.org, X2Go Developers <x2go-dev@lists.x2go.org>:
Bug#915; Package x2goclient. (Wed, 14 Aug 2019 14:30:04 GMT) (full text, mbox, link).


Acknowledgement sent to Frank Lenaerts <frank.lenaerts@sckcen.be>:
Extra info received and forwarded to list. Copy sent to X2Go Developers <x2go-dev@lists.x2go.org>. (Wed, 14 Aug 2019 14:30:04 GMT) (full text, mbox, link).


Message #15 received at 915@bugs.x2go.org (full text, mbox, reply):

From: Frank Lenaerts <frank.lenaerts@sckcen.be>
To: <915@bugs.x2go.org>
Subject: GSSAPI Auth Bug
Date: Wed, 14 Aug 2019 16:28:40 +0200
Hi

I think it has to do with the fact that, the first time you connect to
the server, its key has to be accepted. As soon as you accept it (in a
plain ssh session), the X2go client works as expected i.o.w. it's just
that the X2go client can't cope with the message asking you to accept
the host's key or not.

-- 
Kind regards

Frank Lenaerts
SCK·CEN / ICT Group
Boeretang 200
B-2400 Mol
Belgium
Tel.: +3214338723


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