This is a regression from the version of the client in 14.04 compared to 13.10. I'm connecting to 12.04.4 for a server. Expected behaviour: Creating a connection with the option "-o Tunnel=ethernet" will create a layer2 ethernet tap device. Actual behaviour: New client creates a layer3 IP tunnel. The old version of the client that works properly (installed manually on 14.04): OpenSSH_6.2p2 Ubuntu-6ubuntu0.3, OpenSSL 1.0.1f 6 Jan 2014 The new version of the client that does not work properly: OpenSSH_6.6p1 Ubuntu-2ubuntu1, OpenSSL 1.0.1f 6 Jan 2014 The version of the SSH server I'm connecting to: openssh-server: Installed: 1:5.9p1-5ubuntu1.3 Candidate: 1:5.9p1-5ubuntu1.3 Version table: *** 1:5.9p1-5ubuntu1.3 0 500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages 500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages 100 /var/lib/dpkg/status 1:5.9p1-5ubuntu1 0 500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages ##################################### Terminal output with the old version: ssh -p 38613 @ -w any -o Tunnel=ethernet -vvv OpenSSH_6.2p2 Ubuntu-6ubuntu0.3, 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 * debug1: auto-mux: Trying existing master debug1: Control socket "" does not exist debug2: ssh_connect: needpriv 0 debug1: Connecting to [] port 38613. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug3: Incorrect RSA1 identifier debug3: Could not load "/root/.ssh/id_rsa" as a RSA1 public key debug1: identity file /root/.ssh/id_rsa type 1 debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-16384 debug1: Checking blacklist file /etc/ssh/blacklist.RSA-16384 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/root/.ssh/id_ecdsa" as a RSA1 public key debug1: identity file /root/.ssh/id_ecdsa type 3 debug1: Checking blacklist file /usr/share/ssh/blacklist.ECDSA-521 debug1: Checking blacklist file /etc/ssh/blacklist.ECDSA-521 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_6.2p2 Ubuntu-6ubuntu0.3 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.3 debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.3 pat OpenSSH_5* debug2: fd 3 setting O_NONBLOCK debug3: put_host_port: []:38613 debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ,,,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ,,,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,,,,,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,,,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,,,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: ,,,,,,,,,hmac-md5,hmac-sha1,,,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: ,,,,,,,,,hmac-md5,hmac-sha1,,,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,,zlib debug2: kex_parse_kexinit: none,,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: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 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: found hmac-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: found hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA debug3: put_host_port: []:38613 debug3: put_host_port: []:38613 debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug1: Host '[]:38613' is known and matches the ECDSA host key. debug1: Found key in /root/.ssh/known_hosts:24 debug1: ssh_ecdsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS 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: /root/.ssh/id_rsa (0xhex), debug2: key: /root/.ssh/id_dsa ((nil)), debug2: key: /root/.ssh/id_ecdsa (0xhex), debug1: Authentications that can continue: publickey debug3: start over, passed a different list publickey 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: Offering RSA public key: /root/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey debug1: Trying private key: /root/.ssh/id_dsa debug3: no such identity: /root/.ssh/id_dsa: No such file or directory debug1: Offering ECDSA public key: /root/.ssh/id_ecdsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ecdsa-sha2-nistp521 blen 172 debug2: input_userauth_pk_ok: fp debug3: sign_and_send_pubkey: ECDSA debug1: read PEM private key done: type ECDSA debug1: Authentication succeeded (publickey). Authenticated to ([]:38613). debug1: Requesting tun unit 2147483647 in mode 2 debug1: sys_tun_open: tunnel mode 2 fd 4 debug2: fd 4 setting O_NONBLOCK debug3: fd 4 is O_NONBLOCK debug1: channel 0: new [tun] debug1: setting up multiplex master socket debug3: muxserver_listen: temporary control path debug2: fd 5 setting O_NONBLOCK debug3: fd 5 is O_NONBLOCK debug3: fd 5 is O_NONBLOCK debug1: channel 1: new [] debug3: muxserver_listen: mux listener channel 1 fd 5 debug1: channel 2: new [client-session] debug3: ssh_session2_open: channel_new: 2 debug2: channel 2: send open debug1: Entering interactive session. debug2: channel 0: open confirm rwindow 2097152 rmax 32768 debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x10 debug2: client_session2_setup: id 2 debug2: channel 2: request pty-req confirm 1 debug1: Sending environment. debug3: Ignored env LANGUAGE debug3: Ignored env PATH debug1: Sending env LANG = en_US.UTF-8 debug2: channel 2: request env confirm 0 debug3: Ignored env DISPLAY debug3: Ignored env XAUTHORITY debug3: Ignored env TERM debug3: Ignored env HOME debug3: Ignored env TZ debug3: Ignored env HOSTNAME debug1: Sending env LC_ALL = en_US.UTF-8 debug2: channel 2: request env confirm 0 debug1: Sending env LC_CTYPE = C debug2: channel 2: request env confirm 0 debug3: Ignored env SHELL debug3: Ignored env LOGNAME debug3: Ignored env USER debug3: Ignored env USERNAME debug3: Ignored env MAIL debug3: Ignored env SUDO_COMMAND debug3: Ignored env SUDO_USER debug3: Ignored env SUDO_UID debug3: Ignored env SUDO_GID debug3: Ignored env SHLVL debug3: Ignored env PWD debug3: Ignored env OLDPWD debug3: Ignored env mapfile debug3: Ignored env HISTFILE debug3: Ignored env HISTSIZE debug3: Ignored env SAVEHIST debug3: Ignored env PAGER debug3: Ignored env EDITOR debug3: Ignored env DEBFULLNAME debug3: Ignored env DEBEMAIL debug3: Ignored env _ debug2: channel 2: request shell confirm 1 debug2: callback done debug2: channel 2: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 99 id 2 debug2: PTY allocation request accepted on channel 2 debug2: channel 2: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 2 debug2: shell request accepted on channel 2 Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.2.0-60-generic x86_64) * Documentation: https://help.ubuntu.com/ 0 packages can be updated. 0 updates are security updates. *** System restart required *** Last login: Sun May 4 22:08:47 2014 from 216.7.125.200 @andersen-Presario-F500-GF606UA-ABA:~# ifconfig -a tap0 Link encap:Ethernet HWaddr 3a:8b:12:39:49:11 BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) root@andersen-Presario-F500-GF606UA-ABA:~# ################################################## New client: ssh -p 38613 @ -w any -o Tunnel=ethernet -vvv 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 * debug1: auto-mux: Trying existing master debug1: Control socket "" does not exist debug2: ssh_connect: needpriv 0 debug1: Connecting to [] port 38613. debug1: Connection established. debug1: permanently_set_uid: 0/0 debug3: Incorrect RSA1 identifier debug3: Could not load "/root/.ssh/id_rsa" as a RSA1 public key debug1: identity file /root/.ssh/id_rsa type 1 debug1: identity file /root/.ssh/id_rsa-cert type -1 debug1: identity file /root/.ssh/id_dsa type -1 debug1: identity file /root/.ssh/id_dsa-cert type -1 debug3: Incorrect RSA1 identifier debug3: Could not load "/root/.ssh/id_ecdsa" as a RSA1 public key debug1: identity file /root/.ssh/id_ecdsa type 3 debug1: identity file /root/.ssh/id_ecdsa-cert type -1 debug1: identity file /root/.ssh/id_ed25519 type -1 debug1: identity file /root/.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 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.3 debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.3 pat OpenSSH_5* compat 0x0c000000 debug2: fd 3 setting O_NONBLOCK debug3: put_host_port: []:38613 debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug3: order_hostkeyalgs: prefer hostkeyalgs: ,,,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: ,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ,,,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,,,,,,ssh-ed25519,ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,,,,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,,,,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: ,,,,,,,,,hmac-md5,hmac-sha1,,,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: ,,,,,,,,,hmac-md5,hmac-sha1,,,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,,zlib debug2: kex_parse_kexinit: none,,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: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256 debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour, debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,,hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,,hmac-sha1-96,hmac-md5-96 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-md5 debug1: kex: server->client aes128-ctr hmac-md5 none debug2: mac_setup: setup hmac-md5 debug1: kex: client->server aes128-ctr hmac-md5 none debug1: sending SSH2_MSG_KEX_ECDH_INIT debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ECDSA debug3: put_host_port: []:38613 debug3: put_host_port: []:38613 debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug3: load_hostkeys: loading entries for host "[]:38613" from file "/root/.ssh/known_hosts" debug3: load_hostkeys: found key type ECDSA in file /root/.ssh/known_hosts:24 debug3: load_hostkeys: loaded 1 keys debug1: Host '[]:38613' is known and matches the ECDSA host key. debug1: Found key in /root/.ssh/known_hosts:24 debug1: ssh_ecdsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS 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: /root/.ssh/id_rsa (0xhex), debug2: key: /root/.ssh/id_dsa ((nil)), debug2: key: /root/.ssh/id_ecdsa (0xhex), debug2: key: /root/.ssh/id_ed25519 ((nil)), debug1: Authentications that can continue: publickey debug3: start over, passed a different list publickey 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: Offering RSA public key: /root/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey debug1: Trying private key: /root/.ssh/id_dsa debug3: no such identity: /root/.ssh/id_dsa: No such file or directory debug1: Offering ECDSA public key: /root/.ssh/id_ecdsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ecdsa-sha2-nistp521 blen 172 debug2: input_userauth_pk_ok: fp debug3: sign_and_send_pubkey: ECDSA debug1: key_parse_private2: missing begin marker debug1: read PEM private key done: type ECDSA debug1: Authentication succeeded (publickey). Authenticated to ([]:38613). debug1: Requesting tun unit 2147483647 in mode 1 <------------------------------------This part seems different: mode 1 instead of 2? debug1: sys_tun_open: tunnel mode 1 fd 4 debug2: fd 4 setting O_NONBLOCK debug3: fd 4 is O_NONBLOCK debug1: channel 0: new [tun] debug1: setting up multiplex master socket debug3: muxserver_listen: temporary control path debug2: fd 5 setting O_NONBLOCK debug3: fd 5 is O_NONBLOCK debug3: fd 5 is O_NONBLOCK debug1: channel 1: new [] debug3: muxserver_listen: mux listener channel 1 fd 5 debug1: channel 2: new [client-session] debug3: ssh_session2_open: channel_new: 2 debug2: channel 2: send open debug1: Entering interactive session. debug2: channel 0: open confirm rwindow 2097152 rmax 32768 debug2: callback start debug2: fd 3 setting TCP_NODELAY debug3: packet_set_tos: set IP_TOS 0x10 debug2: client_session2_setup: id 2 debug2: channel 2: request pty-req confirm 1 debug1: Sending environment. debug3: Ignored env LANGUAGE debug3: Ignored env PATH debug1: Sending env LANG = en_US.UTF-8 debug2: channel 2: request env confirm 0 debug3: Ignored env DISPLAY debug3: Ignored env XAUTHORITY debug3: Ignored env TERM debug3: Ignored env HOME debug3: Ignored env TZ debug3: Ignored env HOSTNAME debug1: Sending env LC_ALL = en_US.UTF-8 debug2: channel 2: request env confirm 0 debug1: Sending env LC_CTYPE = C debug2: channel 2: request env confirm 0 debug3: Ignored env SHELL debug3: Ignored env LOGNAME debug3: Ignored env USER debug3: Ignored env USERNAME debug3: Ignored env MAIL debug3: Ignored env SUDO_COMMAND debug3: Ignored env SUDO_USER debug3: Ignored env SUDO_UID debug3: Ignored env SUDO_GID debug3: Ignored env SHLVL debug3: Ignored env PWD debug3: Ignored env OLDPWD debug3: Ignored env mapfile debug3: Ignored env HISTFILE debug3: Ignored env HISTSIZE debug3: Ignored env SAVEHIST debug3: Ignored env PAGER debug3: Ignored env EDITOR debug3: Ignored env DEBFULLNAME debug3: Ignored env DEBEMAIL debug3: Ignored env _ debug2: channel 2: request shell confirm 1 debug2: callback done debug2: channel 2: open confirm rwindow 0 rmax 32768 debug2: channel_input_status_confirm: type 99 id 2 debug2: PTY allocation request accepted on channel 2 debug2: channel 2: rcvd adjust 2097152 debug2: channel_input_status_confirm: type 99 id 2 debug2: shell request accepted on channel 2 Welcome to Ubuntu 12.04.4 LTS (GNU/Linux 3.2.0-60-generic x86_64) * Documentation: https://help.ubuntu.com/ 0 packages can be updated. 0 updates are security updates. *** System restart required *** Last login: Sun May 4 22:11:12 2014 from 216.7.125.200 @andersen-Presario-F500-GF606UA-ABA:~# ifconfig -a tun0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 POINTOPOINT NOARP MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) root@andersen-Presario-F500-GF606UA-ABA:~# I'd do a bisect search if I had a way to build the results of each test into a package that I can cleanly remove from my system (so I can go back to a working version so I can get things done :) ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: openssh-client 1:6.6p1-2ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 NonfreeKernelModules: nvidia zfs zunicode zavl zcommon znvpair ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 Date: Sun May 4 22:21:00 2014 RelatedPackageVersions: ssh-askpass N/A libpam-ssh N/A keychain N/A ssh-askpass-gnome 1:6.6p1-2ubuntu1 SSHClientVersion: OpenSSH_6.6p1 Ubuntu-2ubuntu1, OpenSSL 1.0.1f 6 Jan 2014 SourcePackage: openssh UpgradeStatus: Upgraded to trusty on 2014-04-19 (16 days ago) modified.conffile..etc.ssh.ssh.config: [modified] mtime.conffile..etc.ssh.ssh.config: 2014-01-09T17:28:07.618248