similar to: Warning: No xauth data; using fake authentication data for X11 forwarding.

I'm seeing that warning quite often. I can easily reproduce it by doing something like this: # for i in $(seq 50);do ssh <server> date&;done That's a cvs/ssh server and has 'MaxStartups 50' in /etc/ssh/sshd_config. Server sshd is: OpenSSH_4.3p2 Debian-9etch3 pat OpenSSH Client ssh is: OpenSSH_5.1p1 Debian-3, OpenSSL 0.9.8g 19 Oct 2007 I've also seen

I still don't understand the point of authenticating myself to my own local X server when using X11 forwarding, I tried: ssh -R /tmp/.X11-unix/X0:/tmp/.X11-unix/X0 user at server # and then DISPLAY=:0 xterm and everything is working fine without the mess with xauth, so why it is required to use use xauth when doing X11 forwarding with ssh?

$ ssh -v OpenSSH_5.1, OpenSSL 0.9.8j 07 Jan 2009 $ ssh -vvv -X example.com [ Relevant debug info: ] debug1: Remote protocol version 2.0, remote software version OpenSSH_5.1 [OpenSSH_5.1, OpenSSL 0.9.7j 04 May 2006] debug2: x11_get_proto: /usr/X11R6/bin/xauth -f /tmp/ssh-TLLOFKxvay/xauthfile generate :0.0 MIT-MAGIC-COOKIE-1 untrusted timeout 1200 2>/dev/null Warning: untrusted X11 forwarding

just cvsupped to get the panic cure. hosts with v6 enabled get lock-ups. no detail yet, as i am remote from them and am deciding whether to wait for remote hands to power cycle or to start driving. but two of them got very very net soggy. and i went in out of band to the console, disabled v6 in /etc/rc.conf, rebooted, and they're fine. the third host is dead to the world :-( [ and i can

http://bugzilla.mindrot.org/show_bug.cgi?id=803 Summary: Security Bug: X11 Forwarding is more powerful than it needs to be. Product: Portable OpenSSH Version: -current Platform: All OS/Version: All Status: NEW Severity: major Priority: P2 Component: ssh AssignedTo: openssh-bugs

in reply to: 5.1p1 and X11 forwarding failing http://lists.mindrot.org/pipermail/openssh-unix-dev/2009-February/027183.html I have the impression that SSH is running xauth with a filename in a temporary directory that does not exist: local:~ $ ssh -vv user at remote ... debug2: x11_get_proto: /usr/bin/xauth -f /tmp/ssh-VskgWb3776/xauthfile generate :0 MIT-MAGIC-COOKIE-1 untrusted timeout 1200

On 2005-01-11 at 6:36:13 Darren Tucker said: > kochera at postfinance.ch wrote: > > We upgraded from 3.7.1p2 to 3.9p1. The behaviour of the X11 forwarding > > changed significantly, it is much slower. See below the truss output > > (server side which runs 3.7.1p2) an check for the timestamp (6 seconds > > delay). Do you have any idea what may causes this behaviour?

http://bugzilla.mindrot.org/show_bug.cgi?id=338 ------- Additional Comments From stevesk at pobox.com 2002-07-07 04:00 ------- will look into this ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee.

So I'm working from home today, and for the first time I've tried running Evolution over a forwarded X11 connection. Even though work has a T1 and I have 640k at home, and ssh is compressing, it's ... rather slow. So I fire off lbxproxy and try to run an xterm to see if it works. No dice, authentication denied. Does anybody have any experience with this? Is it possible to run

when i exit more, vi, ... i like to have the window restored to the way it was before i entered more, vi, ... i used to effect this by a hack to the termcap data, but have lost the hack. what am i missing here? randy

I can't seem to get X11 forwarding to work. Similar problems seem to have been reported and possibly fixed with earlier versions of openssh, but I believe I have the latest release: openssh-server-2.9p1-1 for RedHat 6.2. When I connect with ssh -v, I get: pac2: Requesting X11 forwarding with authentication spoofing. pac2: Remote: X11 forwarding disabled in server configuration file. Warning:

On Thu, 15 Nov 2001, Dan Astoorian wrote: > Date: Thu, 15 Nov 2001 16:09:20 -0500 > From: Dan Astoorian <djast at cs.toronto.edu> > To: Ed Phillips <ed at UDel.Edu> > Subject: Re: X11 cookies and forwarding > > On Thu, 15 Nov 2001 15:46:22 EST, Ed Phillips writes: > > I'm guess I wasn't following the whole cookies discussion completely > >

This has to be a FAQ, but I can't find anything on it at the web site. I've installed openssh on several computers now and have yet to get X11 forwarding to work. I get the following when I log into a computer with ssh: Warning: Remote host denied X11 forwarding, perhaps xauth program could not be run on the server side. However: $ which xauth /usr/X11R6/bin/xauth Please reply by

http://bugzilla.mindrot.org/show_bug.cgi?id=185 Summary: --with-ipv4-default breaks X11-forwarding on HP-UX 10.20 Product: Portable OpenSSH Version: 3.1p1 Platform: HPPA OS/Version: HP-UX Status: NEW Severity: normal Priority: P2 Component: sshd AssignedTo: openssh-unix-dev at mindrot.org

Dear people, since openssh-3.8.1p1 I experience problems with the automatic X11 forwarding. I installed openssh-3.9p1 yesterday hoping the problems should disappear, but alas no. It looks like the X11 autorization times out after some time, I don't know exactly but after half an hour it surely is gone. When I installed openssh-3.8.1p1 I also had opgraded openssl from 0.9.7c to 0.9.7d then,

Help Thank You, Ken Zachreson On Aug 6, 2017 2:00 AM, dovecot-request at dovecot.org wrote: ATTENTION: This email was sent from someone outside of GCRC. Always use caution when opening attachments or clicking links, and when receiving unexpected emails. Send dovecot mailing list submissions to dovecot at dovecot.org To subscribe or unsubscribe via the World Wide Web, visit

I login from system using Openssh 4.0p1 or 4.1p1 to systems running Openssh before 3.9p1 or 3.7p1. It appears the X11 stuff are either blocked or not recognised. I get errors like "xterm Xt error: Can't open display: <host>:10.0" or "X11 connection rejected because of wrong authentication. X connection to localhost:10.0 broken....." depending on whether I use

http://bugzilla.mindrot.org/show_bug.cgi?id=733 Summary: ssh doing xauth stuff even when it can't access local .Xauthority file Product: Portable OpenSSH Version: -current Platform: UltraSparc OS/Version: Solaris Status: NEW Severity: normal Priority: P2 Component: ssh

I am using the openssh-2.1.0p3-1 RPM, but i seem to have a similar problem. the debug doesn't say anything about "X11 connection uses different authentication protocol." it just kicks me out. I can't figure it out. very strange. please CC me, because i am not subscribed. thanks, e:~> echo $XAUTHORITY XAUTHORITY: Undefined variable. e:~> xauth list

>> auth: in openpam_parse_chain(): /etc/pam.d/dovecot(1): missing or invalid facility > > I do not think that it has something to do with the dovecot settings > itself but perhaps with the pam facility settings instead? i can believe that. any clues to debug? randy