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[Bug 1318192] Re: 14.04 host can not ssh to a Cisco router

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: andrew yourtchenko <ayourtch@xxxxxxxxx>
Date: Tue, 12 Aug 2014 15:00:51 -0000
Reply-to: Bug 1318192 <1318192@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
*** This bug is a duplicate of bug 1287222 ***
    https://bugs.launchpad.net/bugs/1287222

The bug filed against the Cisco ssh client is CSCuo76464  - its fix
resolves the issue.

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https://bugs.launchpad.net/bugs/1318192

Title:
  14.04 host can not ssh to a Cisco router

Status in “openssh” package in Ubuntu:
  Confirmed

Bug description:
  I can not connect from a freshly installed 14.04 box to a Cisco
  CSR1000V. 12.04 connects with no issues.

  Debugging this, the symptoms are identical to this bug report:
  https://bugzilla.redhat.com/show_bug.cgi?id=1026430

  see the logs below (hostnames, addresses, and usernames below are
  edited).

  Failing attempt (the default settings):

  
  $ ssh -vvv username@router.example
  OpenSSH_6.6, OpenSSL 1.0.1f 6 Jan 2014
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug2: ssh_connect: needpriv 0
  debug1: Connecting to router.example [2001:db8::1] port 22.
  debug1: Connection established.
  debug1: SELinux support disabled
  debug1: identity file /home/ubuntu/.ssh/id_rsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_dsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_ecdsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_ed25519 type -1
  debug1: identity file /home/ubuntu/.ssh/id_ed25519-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx
  debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib
  debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
  debug2: kex_parse_kexinit: ssh-rsa
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
  debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96
  debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96
  debug2: kex_parse_kexinit: none
  debug2: kex_parse_kexinit: none
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: mac_setup: setup hmac-sha1
  debug1: kex: server->client aes128-ctr hmac-sha1 none
  debug2: mac_setup: setup hmac-sha1
  debug1: kex: client->server aes128-ctr hmac-sha1 none
  debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<7680<8192) sent
  debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
  Connection closed by 2001:db8::1


  Working attempt:


  $ ssh -vvv -o KexAlgorithms=diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 username@router.example
  OpenSSH_6.6, OpenSSL 1.0.1f 6 Jan 2014
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug2: ssh_connect: needpriv 0
  debug1: Connecting to router.example [2001:db8::1] port 22.
  debug1: Connection established.
  debug1: identity file /home/ubuntu/.ssh/id_rsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_rsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_dsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_dsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_ecdsa type -1
  debug1: identity file /home/ubuntu/.ssh/id_ecdsa-cert type -1
  debug1: identity file /home/ubuntu/.ssh/id_ed25519 type -1
  debug1: identity file /home/ubuntu/.ssh/id_ed25519-cert type -1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.6p1 Ubuntu-2ubuntu1
  debug1: Remote protocol version 1.99, remote software version Cisco-1.25
  debug1: no match: Cisco-1.25
  debug2: fd 3 setting O_NONBLOCK
  debug3: load_hostkeys: loading entries for host "router.example" from file "/home/ubuntu/.ssh/known_hosts"
  debug3: load_hostkeys: found key type RSA in file /home/ubuntu/.ssh/known_hosts:1
  debug3: load_hostkeys: loaded 1 keys
  debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug2: kex_parse_kexinit: diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
  debug2: kex_parse_kexinit: ssh-rsa-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v00@xxxxxxxxxxx,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp384-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp521-cert-v01@xxxxxxxxxxx,ssh-ed25519-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v01@xxxxxxxxxxx,ssh-dss-cert-v00@xxxxxxxxxxx,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,ssh-dss
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,chacha20-poly1305@xxxxxxxxxxx,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@xxxxxxxxxxxxxx
  debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-ripemd160-etm@xxxxxxxxxxx,hmac-sha1-96-etm@xxxxxxxxxxx,hmac-md5-96-etm@xxxxxxxxxxx,hmac-md5,hmac-sha1,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@xxxxxxxxxxx,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib
  debug2: kex_parse_kexinit: none,zlib@xxxxxxxxxxx,zlib
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
  debug2: kex_parse_kexinit: ssh-rsa
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,aes128-cbc,3des-cbc,aes192-cbc,aes256-cbc
  debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96
  debug2: kex_parse_kexinit: hmac-sha1,hmac-sha1-96
  debug2: kex_parse_kexinit: none
  debug2: kex_parse_kexinit: none
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: set_newkeys: mode 0
  debug1: SSH2_MSG_NEWKEYS received
  debug1: Roaming not allowed by server
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug2: service_accept: ssh-userauth
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug2: key: /home/ubuntu/.ssh/id_rsa ((nil)),
  debug2: key: /home/ubuntu/.ssh/id_dsa ((nil)),
  debug2: key: /home/ubuntu/.ssh/id_ecdsa ((nil)),
  debug2: key: /home/ubuntu/.ssh/id_ed25519 ((nil)),
  debug1: Authentications that can continue: publickey,keyboard-interactive,password
  debug3: start over, passed a different list publickey,keyboard-interactive,password
  debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-interactive,password
  debug3: authmethod_lookup publickey
  debug3: remaining preferred: keyboard-interactive,password
  debug3: authmethod_is_enabled publickey
  debug1: Next authentication method: publickey
  debug1: Trying private key: /home/ubuntu/.ssh/id_rsa
  debug3: no such identity: /home/ubuntu/.ssh/id_rsa: No such file or directory
  debug1: Trying private key: /home/ubuntu/.ssh/id_dsa
  debug3: no such identity: /home/ubuntu/.ssh/id_dsa: No such file or directory
  debug1: Trying private key: /home/ubuntu/.ssh/id_ecdsa
  debug3: no such identity: /home/ubuntu/.ssh/id_ecdsa: No such file or directory
  debug1: Trying private key: /home/ubuntu/.ssh/id_ed25519
  debug3: no such identity: /home/ubuntu/.ssh/id_ed25519: No such file or directory
  debug2: we did not send a packet, disable method
  debug3: authmethod_lookup keyboard-interactive
  debug3: remaining preferred: password
  debug3: authmethod_is_enabled keyboard-interactive
  debug1: Next authentication method: keyboard-interactive
  debug2: userauth_kbdint
  debug2: we sent a keyboard-interactive packet, wait for reply
  debug2: input_userauth_info_req
  debug2: input_userauth_info_req: num_prompts 1
  Password: 
  debug3: packet_send2: adding 32 (len 24 padlen 8 extra_pad 64)
  debug1: Authentication succeeded (keyboard-interactive).
  Authenticated to router.example ([2001:db8::1]:22).
  debug1: channel 0: new [client-session]
  debug3: ssh_session2_open: channel_new: 0
  debug2: channel 0: send open
  debug1: Entering interactive session.
  debug2: callback start
  debug2: fd 3 setting TCP_NODELAY
  debug3: packet_set_tos: set IPV6_TCLASS 0x10
  debug2: client_session2_setup: id 0
  debug2: channel 0: request pty-req confirm 1
  debug1: Sending environment.
  debug3: Ignored env XDG_VTNR
  debug3: Ignored env LESS_TERMCAP_mb
  debug3: Ignored env XDG_SESSION_ID
  debug3: Ignored env LESS_TERMCAP_md
  debug3: Ignored env LESS_TERMCAP_me
  debug3: Ignored env SHELL
  debug3: Ignored env TERM
  debug3: Ignored env BYOBU_CONFIG_DIR
  debug3: Ignored env HUSHLOGIN
  debug3: Ignored env LESS_TERMCAP_ue
  debug3: Ignored env BYOBU_TTY
  debug3: Ignored env BYOBU_READLINK
  debug3: Ignored env USER
  debug3: Ignored env LS_COLORS
  debug3: Ignored env GREP_COLORS
  debug3: Ignored env BYOBU_RUN_DIR
  debug3: Ignored env BYOBU_DISTRO
  debug3: Ignored env BYOBU_DATE
  debug3: Ignored env TMUX
  debug3: Ignored env LESS_TERMCAP_us
  debug3: Ignored env BYOBU_BACKEND
  debug3: Ignored env BYOBU_SED
  debug3: Ignored env PATH
  debug3: Ignored env MAIL
  debug3: Ignored env BYOBU_DARK
  debug3: Ignored env PWD
  debug3: Ignored env BYOBU_ULIMIT
  debug1: Sending env LANG = en_US.UTF-8
  debug2: channel 0: request env confirm 0
  debug3: Ignored env TMUX_PANE
  debug3: Ignored env BYOBU_PYTHON
  debug3: Ignored env BYOBU_CHARMAP
  debug3: Ignored env BYOBU_WINDOW_NAME
  debug3: Ignored env HOME
  debug3: Ignored env SHLVL
  debug3: Ignored env XDG_SEAT
  debug3: Ignored env LANGUAGE
  debug3: Ignored env BYOBU_LIGHT
  debug3: Ignored env LOGNAME
  debug3: Ignored env LESS_TERMCAP_so
  debug3: Ignored env BYOBU_PAGER
  debug3: Ignored env BYOBU_ACCENT
  debug3: Ignored env LESSOPEN
  debug3: Ignored env BYOBU_PREFIX
  debug3: Ignored env XDG_RUNTIME_DIR
  debug3: Ignored env BYOBU_HIGHLIGHT
  debug3: Ignored env LESSCLOSE
  debug3: Ignored env LESS_TERMCAP_se
  debug3: Ignored env BYOBU_TIME
  debug3: Ignored env _
  debug2: channel 0: request shell confirm 1
  debug2: callback done
  debug2: channel 0: open confirm rwindow 8192 rmax 4096
  debug2: channel_input_status_confirm: type 99 id 0
  debug2: PTY allocation request accepted on channel 0
  debug2: channel_input_status_confirm: type 99 id 0
  debug2: shell request accepted on channel 0

  router#


  version information:

  $ lsb_release -rd
  Description:    Ubuntu 14.04 LTS
  Release:        14.04

  $ apt-cache policy openssh-client
  openssh-client:
    Installed: 1:6.6p1-2ubuntu1
    Candidate: 1:6.6p1-2ubuntu1
    Version table:
   *** 1:6.6p1-2ubuntu1 0
          500 http://be.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages
          100 /var/lib/dpkg/status

  CSR1000V version:

  router#sh ver
  Cisco IOS XE Software, Version 03.12.00.S - Standard Support Release
  Cisco IOS Software, CSR1000V Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 15.4(2)S, RELEASE SOFTWARE (fc2)
  Technical Support: http://www.cisco.com/techsupport
  Copyright (c) 1986-2014 by Cisco Systems, Inc.
  Compiled Wed 26-Mar-14 21:09 by mcpre

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