Here's my ssh invocation and output:
garydale@transponder:~$ ssh molar -L 5904:192.168.22.1:5900 -vvv
OpenSSH_7.9p1 Debian-10, OpenSSL 1.1.1b 26 Feb 2019
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "molar" port 22
debug2: ssh_connect_direct
debug1: Connecting to molar [99.248.179.149] port 22.
debug1: Connection established.
debug1: identity file /home/garydale/.ssh/id_rsa type 0
debug1: identity file /home/garydale/.ssh/id_rsa-cert type -1
debug1: identity file /home/garydale/.ssh/id_dsa type -1
debug1: identity file /home/garydale/.ssh/id_dsa-cert type -1
debug1: identity file /home/garydale/.ssh/id_ecdsa type -1
debug1: identity file /home/garydale/.ssh/id_ecdsa-cert type -1
debug1: identity file /home/garydale/.ssh/id_ed25519 type -1
debug1: identity file /home/garydale/.ssh/id_ed25519-cert type -1
debug1: identity file /home/garydale/.ssh/id_xmss type -1
debug1: identity file /home/garydale/.ssh/id_xmss-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.9p1 Debian-10
debug1: Remote protocol version 2.0, remote software version
OpenSSH_7.4p1 Debian-10+deb9u6
debug1: match: OpenSSH_7.4p1 Debian-10+deb9u6 pat
OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7*
compat 0x04000002
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to molar:22 as 'garydale'
debug3: hostkeys_foreach: reading file "/home/garydale/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file
/home/garydale/.ssh/known_hosts:5
debug3: load_hostkeys: loaded 1 keys from molar
debug3: order_hostkeyalgs: prefer hostkeyalgs:
ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms:
curve25519-sha256,curve25519-sha...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c
debug2: host key algorithms:
ecdsa-sha2-nistp256-cert-...@openssh.com,ecdsa-sha2-nistp384-cert-...@openssh.com,ecdsa-sha2-nistp521-cert-...@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-...@openssh.com,rsa-sha2-512-cert-...@openssh.com,rsa-sha2-256-cert-...@openssh.com,ssh-rsa-cert-...@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos:
chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com
debug2: ciphers stoc:
chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com
debug2: MACs ctos:
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc:
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,z...@openssh.com,zlib
debug2: compression stoc: none,z...@openssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms:
curve25519-sha256,curve25519-sha...@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms:
ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ssh-ed25519
debug2: ciphers ctos:
chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com
debug2: ciphers stoc:
chacha20-poly1...@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-...@openssh.com,aes256-...@openssh.com
debug2: MACs ctos:
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc:
umac-64-...@openssh.com,umac-128-...@openssh.com,hmac-sha2-256-...@openssh.com,hmac-sha2-512-...@openssh.com,hmac-sha1-...@openssh.com,umac...@openssh.com,umac-...@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,z...@openssh.com
debug2: compression stoc: none,z...@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ecdsa-sha2-nistp256
debug1: kex: server->client cipher: chacha20-poly1...@openssh.com MAC:
<implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1...@openssh.com MAC:
<implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ecdsa-sha2-nistp256
SHA256:XocrDgV4eOMEzmzAzCHNSoxoXIo48dLNxHzWlKpa/mw
debug3: hostkeys_foreach: reading file "/home/garydale/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file
/home/garydale/.ssh/known_hosts:5
debug3: load_hostkeys: loaded 1 keys from molar
debug3: hostkeys_foreach: reading file "/home/garydale/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file
/home/garydale/.ssh/known_hosts:18
debug3: load_hostkeys: loaded 1 keys from 99.248.179.149
debug1: Host 'molar' is known and matches the ECDSA host key.
debug1: Found key in /home/garydale/.ssh/known_hosts:5
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug1: Will attempt key: /home/garydale/.ssh/id_rsa RSA
SHA256:6M8e+smtYiexfHbrZWHiUQLuZaSWJzF/4EsRDVx5QcY
debug1: Will attempt key: /home/garydale/.ssh/id_dsa
debug1: Will attempt key: /home/garydale/.ssh/id_ecdsa
debug1: Will attempt key: /home/garydale/.ssh/id_ed25519
debug1: Will attempt key: /home/garydale/.ssh/id_xmss
debug2: pubkey_prepare: done
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info:
server-sig-algs=<ssh-ed25519,ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
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 public key: /home/garydale/.ssh/id_rsa RSA
SHA256:6M8e+smtYiexfHbrZWHiUQLuZaSWJzF/4EsRDVx5QcY
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: /home/garydale/.ssh/id_rsa RSA
SHA256:6M8e+smtYiexfHbrZWHiUQLuZaSWJzF/4EsRDVx5QcY
debug3: sign_and_send_pubkey: RSA
SHA256:6M8e+smtYiexfHbrZWHiUQLuZaSWJzF/4EsRDVx5QcY
debug3: sign_and_send_pubkey: signing using ssh-rsa
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to molar ([99.248.179.149]:22).
debug1: Local connections to LOCALHOST:5904 forwarded to remote address
192.168.22.1:5900
debug3: channel_setup_fwd_listener_tcpip: type 2 wildcard 0 addr NULL
debug3: sock_set_v6only: set socket 4 IPV6_V6ONLY
debug1: Local forwarding listening on ::1 port 5904.
debug2: fd 4 setting O_NONBLOCK
debug3: fd 4 is O_NONBLOCK
debug1: channel 0: new [port listener]
debug1: Local forwarding listening on 127.0.0.1 port 5904.
debug2: fd 5 setting O_NONBLOCK
debug3: fd 5 is O_NONBLOCK
debug1: channel 1: new [port listener]
debug1: channel 2: new [client-session]
debug3: ssh_session2_open: channel_new: 2
debug2: channel 2: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessi...@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys...@openssh.com
want_reply 0
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x10
debug2: client_session2_setup: id 2
debug2: channel 2: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env SHELL
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env WINDOWID
debug3: Ignored env QT_ACCESSIBILITY
debug3: Ignored env COLORTERM
debug3: Ignored env XDG_SESSION_PATH
debug3: Ignored env LANGUAGE
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env SHELL_SESSION_ID
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env SSH_AGENT_PID
debug3: Ignored env GTK_RC_FILES
debug3: Ignored env GTK_MODULES
debug3: Ignored env XDG_SEAT
debug3: Ignored env PWD
debug3: Ignored env XDG_SESSION_DESKTOP
debug3: Ignored env LOGNAME
debug3: Ignored env XDG_SESSION_TYPE
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env XAUTHORITY
debug3: Ignored env GTK2_RC_FILES
debug3: Ignored env HOME
debug1: Sending env LANG = en_CA.UTF-8
debug2: channel 2: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env LS_COLORS
debug3: Ignored env XDG_CURRENT_DESKTOP
debug3: Ignored env KONSOLE_DBUS_SERVICE
debug3: Ignored env KONSOLE_DBUS_SESSION
debug3: Ignored env PROFILEHOME
debug3: Ignored env XDG_SEAT_PATH
debug3: Ignored env KDE_SESSION_UID
debug3: Ignored env XDG_SESSION_CLASS
debug3: Ignored env TERM
debug3: Ignored env USER
debug3: Ignored env COLORFGBG
debug3: Ignored env KDE_SESSION_VERSION
debug3: Ignored env PAM_KWALLET5_LOGIN
debug3: Ignored env DISPLAY
debug3: Ignored env SHLVL
debug3: Ignored env XDG_VTNR
debug3: Ignored env XDG_SESSION_ID
debug3: Ignored env GS_LIB
debug3: Ignored env XDG_RUNTIME_DIR
debug1: Sending env LC_TIME = en_CA.UTF-8
debug2: channel 2: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env QT_AUTO_SCREEN_SCALE_FACTOR
debug3: Ignored env XCURSOR_THEME
debug3: Ignored env XDG_DATA_DIRS
debug3: Ignored env KDE_FULL_SESSION
debug3: Ignored env PATH
debug3: Ignored env KONSOLE_PROFILE_NAME
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env _
debug2: channel 2: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 2: callback done
debug2: channel 2: open confirm rwindow 0 rmax 32768
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 2
debug2: PTY allocation request accepted on channel 2
debug2: channel 2: rcvd adjust 2097152
debug3: receive packet: type 99
debug2: channel_input_status_confirm: type 99 id 2
debug2: shell request accepted on channel 2
Linux molar 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 (2019-05-13) x86_64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
You have mail.
Last login: Tue May 28 16:22:24 2019 from 99.237.87.227
garydale@molar:~$
On 2019-05-28 12:54 p.m., Colin Watson wrote:
On Tue, May 28, 2019 at 11:42:44AM -0400, Gary Dale wrote:
Source: openssh
Version: 7.9
Could you give the exact package versions involved? "dpkg-query -W
openssh-client" on the client side and "dpkg-query -W openssh-server" on
the server side.
Since I can connect from the VM, the problem must be with the SSH tunnel.
Because my
ssh session to the remote server is working, the problem appears to be with
ports not
being forwarded.
Could you add the -vvv option to your ssh invocation and post the full
output? That should tell us more about what's going on with port
forwarding.
The problem has only been occuring for no more than 1 week, since I was able to
connect
early last week.
As you can see on https://tracker.debian.org/pkg/openssh, openssh hasn't
changed in either stable or testing in over a month, so if the problem
only started a week ago then it was probably caused by something else.
Perhaps something at the network layer?
