[Bug 874518] Re: ssh fails after upgrade to 11.10

Clint Byrum clint at fewbar.com
Sat Oct 15 06:15:52 UTC 2011 

Excerpts from Jason Nett's message of Sat Oct 15 00:54:27 UTC 2011:
> Hi Clint,
> 
> Thanks for getting back to me.  Using ifconfig, my laptop's "inet addr" 
> is "127.0.0.1" and "ssh -vv 127.0.0.1" yields:
> 
> jason:~$ ssh -vv 127.0.0.1
> OpenSSH_5.8p1 Debian-1ubuntu3, OpenSSL 0.9.8o 01 Jun 2010
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug1: Applying options for *
> debug2: ssh_connect: needpriv 0
> debug1: Connecting to 127.0.0.1 [127.0.0.1] port 22.
> debug1: connect to address 127.0.0.1 port 22: Connection refused
> ssh: connect to host 127.0.0.1 port 22: Connection refused
> 
> Despite the "connection refused" I see here, it does connect to where it 
> needs to, as it always has.
> 
> Meanwhile, my desktop's "inet addr" is 192.168.1.64 and the output here
> is:
> 
> jason:~$ ssh -vv 192.168.1.64
> OpenSSH_5.8p1 Debian-7ubuntu1, OpenSSL 1.0.0e 6 Sep 2011
> debug2: ssh_connect: needpriv 0
> debug1: Connecting to 192.168.1.64 [192.168.1.64] port 22.
> debug1: Connection established.
> debug1: identity file /home/jason/.ssh/id_rsa type -1
> debug1: identity file /home/jason/.ssh/id_rsa-cert type -1
> debug1: identity file /home/jason/.ssh/id_dsa type -1
> debug1: identity file /home/jason/.ssh/id_dsa-cert type -1
> debug1: identity file /home/jason/.ssh/id_ecdsa type -1
> debug1: identity file /home/jason/.ssh/id_ecdsa-cert type -1
> debug1: Remote protocol version 2.0, remote software version 
> OpenSSH_5.8p1 Debian-7ubuntu1
> debug1: match: OpenSSH_5.8p1 Debian-7ubuntu1 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_5.8p1 Debian-7ubuntu1
> debug2: fd 3 setting O_NONBLOCK
> debug1: SSH2_MSG_KEXINIT sent
> Read from socket failed: Connection reset by peer
> 
> Again, when I attempt to ssh here I get:
> 
> Permission denied (gssapi-keyex,gssapi-with-mic,keyboard-interactive).
> 

Jason, thanks for the quick response.

The last line: Read from socket fialed; Connectino reset by peer

means that sshd on your desktop did something to disconnect rather
unexpectedly.  It would help to see the contents of /var/log/auth.log
from your desktop, though please remove any sensitive information from
it before posting.

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https://bugs.launchpad.net/bugs/874518

Title:
  ssh fails after upgrade to 11.10

Status in “openssh” package in Ubuntu:
  Incomplete

Bug description:
  I upgraded from 11.04 to 11.10 and upon completion found that I could no longer ssh into other computers that I routinely do so.  There are several things I've checked:
  1. Kerberos authentication is working fine, that's not the problem.
  2. I tried restarting and reinstalling ssh, but neither helped.
  3. I tried copying over all ssh related files from my laptop (with a properly function ssh in 11.04) and replace what is on my 11.10 malfunctioning OS, but that did not help.
  4. I tried deleting the .ssh/known_hosts file.  On my next attempt, I received the normal message about connecting somewhere for the first time, but was still refused a connection.
  5. 

  jason:~$ /usr/sbin/sshd -ddd
  debug2: load_server_config: filename /etc/ssh/sshd_config
  debug2: load_server_config: done config len = 682
  debug2: parse_server_config: config /etc/ssh/sshd_config len 682
  debug3: /etc/ssh/sshd_config:5 setting Port 22
  debug3: /etc/ssh/sshd_config:9 setting Protocol 2
  debug3: /etc/ssh/sshd_config:11 setting HostKey /etc/ssh/ssh_host_rsa_key
  debug3: /etc/ssh/sshd_config:12 setting HostKey /etc/ssh/ssh_host_dsa_key
  debug3: /etc/ssh/sshd_config:13 setting HostKey /etc/ssh/ssh_host_ecdsa_key
  debug3: /etc/ssh/sshd_config:15 setting UsePrivilegeSeparation yes
  debug3: /etc/ssh/sshd_config:18 setting KeyRegenerationInterval 3600
  debug3: /etc/ssh/sshd_config:19 setting ServerKeyBits 768
  debug3: /etc/ssh/sshd_config:22 setting SyslogFacility AUTH
  debug3: /etc/ssh/sshd_config:23 setting LogLevel INFO
  debug3: /etc/ssh/sshd_config:26 setting LoginGraceTime 120
  debug3: /etc/ssh/sshd_config:27 setting PermitRootLogin no
  debug3: /etc/ssh/sshd_config:28 setting StrictModes yes
  debug3: /etc/ssh/sshd_config:30 setting RSAAuthentication yes
  debug3: /etc/ssh/sshd_config:31 setting PubkeyAuthentication yes
  debug3: /etc/ssh/sshd_config:35 setting IgnoreRhosts yes
  debug3: /etc/ssh/sshd_config:37 setting RhostsRSAAuthentication no
  debug3: /etc/ssh/sshd_config:39 setting HostbasedAuthentication no
  debug3: /etc/ssh/sshd_config:44 setting PermitEmptyPasswords no
  debug3: /etc/ssh/sshd_config:48 setting ChallengeResponseAuthentication no
  debug3: /etc/ssh/sshd_config:63 setting X11Forwarding yes
  debug3: /etc/ssh/sshd_config:64 setting X11DisplayOffset 10
  debug3: /etc/ssh/sshd_config:65 setting PrintMotd no
  debug3: /etc/ssh/sshd_config:66 setting PrintLastLog yes
  debug3: /etc/ssh/sshd_config:67 setting TCPKeepAlive yes
  debug3: /etc/ssh/sshd_config:74 setting AcceptEnv LANG LC_*
  debug3: /etc/ssh/sshd_config:76 setting Subsystem sftp /usr/lib/openssh/sftp-server
  debug3: /etc/ssh/sshd_config:87 setting UsePAM yes
  debug1: sshd version OpenSSH_5.8p1 Debian-7ubuntu1
  debug3: Incorrect RSA1 identifier
  debug1: read PEM private key done: type RSA
  debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
  debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
  debug1: private host key: #0 type 1 RSA
  debug3: Incorrect RSA1 identifier
  debug1: read PEM private key done: type DSA
  debug1: Checking blacklist file /usr/share/ssh/blacklist.DSA-1024
  debug1: Checking blacklist file /etc/ssh/blacklist.DSA-1024
  debug1: private host key: #1 type 2 DSA
  debug3: Incorrect RSA1 identifier
  debug1: read PEM private key done: type ECDSA
  debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-256
  debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-256
  debug1: private host key: #2 type 3 ECDSA
  debug1: setgroups() failed: Operation not permitted
  debug1: rexec_argv[0]='/usr/sbin/sshd'
  debug1: rexec_argv[1]='-ddd'
  debug3: oom_adjust_setup
  Set /proc/self/oom_score_adj from 0 to -1000
  debug2: fd 3 setting O_NONBLOCK
  debug1: Bind to port 22 on 0.0.0.0.
  Bind to port 22 on 0.0.0.0 failed: Permission denied.
  debug2: fd 3 setting O_NONBLOCK
  debug3: sock_set_v6only: set socket 3 IPV6_V6ONLY
  debug1: Bind to port 22 on ::.
  Bind to port 22 on :: failed: Permission denied.
  Cannot bind any address.

  Maybe the problem is in that readout, but I'm not familiar enough with
  this output to know.

  My laptop which still has Ubuntu 11.04 still can successfully log into
  the computers I need to, so the problem is definitely related to the
  upgrade of my desktop to 11.10.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: ssh (not installed)
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic-pae 3.0.4
  Uname: Linux 3.0.0-12-generic-pae i686
  NonfreeKernelModules: wl
  ApportVersion: 1.23-0ubuntu3
  Architecture: i386
  Date: Fri Oct 14 13:40:37 2011
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
  ProcEnviron:
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: openssh
  UpgradeStatus: Upgraded to oneiric on 2011-10-14 (0 days ago)

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