X2Go Bug report logs - #272
[X2Go-User] Session resume fails with AFS home directories

version graph

Package: x2goserver; Maintainer for x2goserver is X2Go Developers <x2go-dev@lists.x2go.org>; Source for x2goserver is src:x2goserver.

Reported by: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>

Date: Fri, 26 Jul 2013 14:48:01 UTC

Severity: normal

Found in version 4.0.1.3

Full log


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

Received: (at submit) by bugs.x2go.org; 26 Jul 2013 14:40:08 +0000
From mike.gabriel@das-netzwerkteam.de  Fri Jul 26 16:40:08 2013
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on
	ymir.das-netzwerkteam.de
X-Spam-Level: 
X-Spam-Status: No, score=0.0 required=5.0 tests=RCVD_IN_DNSWL_BLOCKED,
	URIBL_BLOCKED autolearn=ham version=3.3.2
Received: from freya.das-netzwerkteam.de (freya.das-netzwerkteam.de [88.198.48.199])
	by ymir (Postfix) with ESMTPS id EB11A5DB15
	for <submit@bugs.x2go.org>; Fri, 26 Jul 2013 16:40:07 +0200 (CEST)
Received: from grimnir.das-netzwerkteam.de (grimnir.das-netzwerkteam.de [78.46.204.98])
	by freya.das-netzwerkteam.de (Postfix) with ESMTPS id 5803E2C9
	for <submit@bugs.x2go.org>; Fri, 26 Jul 2013 16:40:07 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
	by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id 3E0FD3BD18
	for <submit@bugs.x2go.org>; Fri, 26 Jul 2013 16:40:07 +0200 (CEST)
X-Virus-Scanned: Debian amavisd-new at grimnir.das-netzwerkteam.de
Received: from grimnir.das-netzwerkteam.de ([127.0.0.1])
	by localhost (grimnir.das-netzwerkteam.de [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id 9IUOt1F3aDUr for <submit@bugs.x2go.org>;
	Fri, 26 Jul 2013 16:40:07 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
	by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id 06ABC3BD17
	for <submit@bugs.x2go.org>; Fri, 26 Jul 2013 16:40:07 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
	by grimnir.das-netzwerkteam.de (Postfix) with ESMTP id D3D843BBF3
	for <submit@bugs.x2go.org>; Fri, 26 Jul 2013 16:40:06 +0200 (CEST)
Received: by grimnir.das-netzwerkteam.de (Postfix, from userid 33)
	id 609743BD16; Fri, 26 Jul 2013 16:40:06 +0200 (CEST)
Received: from m-047.informatik.uni-kiel.de (m-047.informatik.uni-kiel.de
 [134.245.254.47]) by mail.das-netzwerkteam.de (Horde Framework) with HTTP;
 Fri, 26 Jul 2013 16:40:06 +0200
Message-ID: <20130726164006.17531y7k798urzgm@mail.das-netzwerkteam.de>
X-Priority: 3 (Normal)
Date: Fri, 26 Jul 2013 16:40:06 +0200
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
To: submit@bugs.x2go.org
Cc: x2go-user@lists.berlios.de
Subject: Re: [X2Go-User] Session resume fails with AFS home directories
References: <51F274E2.3070403@gip.com>
In-Reply-To: <51F274E2.3070403@gip.com>
MIME-Version: 1.0
Content-Type: multipart/signed;
 boundary="=_1vk5qk3dcdvq";
 protocol="application/pgp-signature";
 micalg="pgp-sha1"
Content-Transfer-Encoding: 7bit
User-Agent: Internet Messaging Program (IMP) H3 (4.3.4)
[Message part 1 (text/plain, inline)]
Package: x2goserver
Version: 4.0.1.3

Hi Sebastian,

(quoting your complete original mail, so we have it in the bug report  
I create with this/my reply)

On Fr 26 Jul 2013 15:08:50 CEST Sebastian Flothow wrote:

> I've just set up a Debian 7 box with X2Go. It does work in that it  
> is possible to start new sessions, however, resuming a previous  
> session does not work, it always results in this message: "The  
> remote proxy closed the connection while negotiating the session.  
> This may be due to the wrong authentication credentials passed to  
> the server."
>
> I suspect this is due to the fact that home directories are stored  
> in AFS (for regular users, that is; when logging in as root, whose  
> home directory is on a local ext4 FS, resume does work). Accessing  
> AFS requires an AFS token in the user's name, obtaining this in turn  
> requires a Kerberos ticket. PAM is set up to obtain both  
> automatically on login, but I guess something goes wrong there  
> during session resume.
>
> Is it possible to add custom commands to the X2Go login/resume  
> procedure? It would be quite helpful if the client could run klist  
> and tokens through the ssh session, and either log or display the  
> output.

Is there any environment variable that we have to set before we can  
access the home directory of the user?

My guess is that we have to set at least

  export KRB5CCNAME=???

Maybe any other env var for the AFS token?

We should get this issue fixed upstream, so I have switched over to  
x2go-dev and our bug tracker (done by sending my reply). Please reply  
to 272@bugs.x2go.org with your reply. Thanks.

Mike

-- 

DAS-NETZWERKTEAM
mike gabriel, herweg 7, 24357 fleckeby
fon: +49 (1520) 1976 148

GnuPG Key ID 0x25771B31
mail: mike.gabriel@das-netzwerkteam.de, http://das-netzwerkteam.de

freeBusy:
https://mail.das-netzwerkteam.de/freebusy/m.gabriel%40das-netzwerkteam.de.xfb
[Message part 2 (application/pgp-signature, inline)]

Send a report that this bug log contains spam.


X2Go Developers <owner@bugs.x2go.org>. Last modified: Thu Feb 2 01:18:06 2023; Machine Name: ymir.das-netzwerkteam.de

X2Go Bug tracking system

Debbugs is free software and licensed under the terms of the GNU Public License version 2. The current version can be obtained from https://bugs.debian.org/debbugs-source/.

Copyright © 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson, 2005-2017 Don Armstrong, and many other contributors.