Public bug reported: 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-...@openssh.com,aes256-...@openssh.com,chacha20-poly1...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96debug2: kex_parse_kexinit: none,z...@openssh.com,zlib debug2: kex_parse_kexinit: none,z...@openssh.com,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-...@openssh.com,ssh-rsa-cert-...@openssh.com,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-...@openssh.com,ssh-rsa-cert-...@openssh.com,ssh-rsa,ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@openssh.com,ssh-ed25519-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,ssh-dss-cert-...@openssh.com,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-...@openssh.com,aes256-...@openssh.com,chacha20-poly1...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-...@openssh.com,aes256-...@openssh.com,chacha20-poly1...@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-...@lysator.liu.se debug2: kex_parse_kexinit: hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5-...@openssh.com,hmac-sha1-...@openssh.com,umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-ripemd160-...@openssh.com,hmac-sha1-96-...@openssh.com,hmac-md5-96-...@openssh.com,hmac-md5,hmac-sha1,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,z...@openssh.com,zlib debug2: kex_parse_kexinit: none,z...@openssh.com,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 ** Affects: openssh (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to openssh in Ubuntu. https://bugs.launchpad.net/bugs/1318192 Title: 14.04 host can not ssh to a Cisco router To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1318192/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs
