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Bug#354127: marked as done (ssh: X forwarding stopped working, no changes to config files)

Your message dated Sat, 15 Apr 2006 10:40:52 -0400
with message-id <20060415144051.GA7111@andromeda>
and subject line Bug#354127: Acknowledgement (ssh: X forwarding stopped working, no changes to config files)
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what I am
talking about this indicates a serious mail system misconfiguration
somewhere.  Please contact me immediately.)

Debian bug tracking system administrator
(administrator, Debian Bugs database)
--- Begin Message --- 
Package: ssh
Version: 1:4.2p1-5
Severity: normal


I SSH into my server every day, and then start an mrxvt terminal to be
forwarded back to my desktop. Yesterday after updating a large number of
packages, X forwarding stopped working spontaneously, I made no changes
to
configuration files. I double-checked ssh_config on both desktop and
server
with backups, and verified that they were not changed.

My desktop/ssh client is running Debian testing, my server is running
Debian stable. This bug report/config info below is on my
desktop/client. Following is debug output from my attempt to use X
forwarding, ssh from desktop to server:

$ ssh -v -X router
OpenSSH_4.2p1 Debian-5, OpenSSL 0.9.8a 11 Oct 2005
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to router [192.168.9.1] port 22.
debug1: Connection established.
debug1: identity file /home/ckoen/.ssh/identity type -1
debug1: identity file /home/ckoen/.ssh/id_rsa type -1
debug1: identity file /home/ckoen/.ssh/id_dsa type -1
debug1: Remote protocol version 1.99, remote software version
OpenSSH_3.8.1p1 Debian-8.sarge.4
debug1: match: OpenSSH_3.8.1p1 Debian-8.sarge.4 pat OpenSSH_3.*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.2p1 Debian-5
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-cbc hmac-md5 none
debug1: kex: client->server aes128-cbc hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host 'router' is known and matches the RSA host key.
debug1: Found key in /home/ckoen/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue:
publickey,password,keyboard-interactive
debug1: Next authentication method: publickey
debug1: Trying private key: /home/ckoen/.ssh/identity
debug1: Trying private key: /home/ckoen/.ssh/id_rsa
debug1: Trying private key: /home/ckoen/.ssh/id_dsa
debug1: Next authentication method: keyboard-interactive
Password:
debug1: Authentication succeeded (keyboard-interactive).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
Warning: No xauth data; using fake authentication data for X11
forwarding.
debug1: Requesting X11 forwarding with authentication spoofing.
debug1: Sending environment.
debug1: Sending env LANG = en_US
No mail.

ckoen@4[ckoen]$  mrxvt -bg red &
[1] 19612
debug1: client_input_channel_open: ctype x11 rchan 2 win 65536 max 16384
debug1: client_request_x11: request from 127.0.0.1 3437
debug1: channel 1: new [x11]
debug1: confirm x11
ckoen@4[ckoen]$ Xlib: connection to "localhost:11.0" refused by server
Xlib: Invalid MIT-MAGIC-COOKIE-1 key
debug1: channel 1: free: x11, nchannels 2
mrxvt: can't open display localhost:11.0
[1]+  Exit 1                  mrxvt -bg red


-- System Information:
Debian Release: testing/unstable
  APT prefers testing
  APT policy: (990, 'testing')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.12-a21m.16
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)

Versions of packages ssh depends on:
ii  openssh-client                1:4.2p1-5  Secure shell client, an rlogin/rsh
ii  openssh-server                1:4.2p1-5  Secure shell server, an rshd repla

ssh recommends no packages.

-- debconf information:
  ssh/insecure_rshd:
  ssh/privsep_ask: true
* ssh/user_environment_tell:
* ssh/forward_warning:
  ssh/insecure_telnetd:
  ssh/new_config: true
* ssh/use_old_init_script: true
* ssh/SUID_client: true
  ssh/disable_cr_auth: false
* ssh/privsep_tell:
  ssh/ssh2_keys_merged:
* ssh/protocol2_only: true
  ssh/encrypted_host_key_but_no_keygen:
* ssh/run_sshd: true

--- End Message ---
--- Begin Message --- 
(Unversioned close since this isn't strictly an sssh problem, I think)

On Sat, Apr 15, 2006 at 01:17:25PM +0800, Clayton wrote:
> This problem seems to have gone away in the last couple of days (I
> am not sure what software update did the trick) so this bug report
> could be closed.
Right, I'm not sure either, but it WFM too :)

--- End Message ---
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