X11 forwarding not working.

Sun May 24 15:44:44 AEST 2015

On Sun, May 24, 2015 at 3:36 AM, Darren Tucker <dtucker at zip.com.au> wrote:

> On Sun, May 24, 2015 at 2:56 AM, dE <de.techno at gmail.com> wrote:
>>
>> I'm having a difficult time getting X11 forwarding to work.
>>
>> Since I've read the docs completely about this, this must be an SSH bug
>> which is likely because I'm using Gentoo as the SSH server.
>>
> [...]
>
> I suspect the problem is that you did not have xauth in your path when you
> built OpenSSH and thus sshd does not know where to find it.  Try adding
> "XAuthLocation /path/to/your/xauth" to your sshd_config and restart sshd.
>
> If that doesn't help then please post the debug output from both client
> and server (ie /path/to/sshd -ddd and ssh -vvv) and we might be able to
> figure out what's going on.
>
> --
> Darren Tucker (dtucker at zip.com.au)
> GPG key 8FF4FA69 / D9A3 86E9 7EEE AF4B B2D4  37C9 C982 80C7 8FF4 FA69
>     Good judgement comes with experience. Unfortunately, the experience
> usually comes from bad judgement.
>

OpenSSH_6.4, OpenSSL 1.0.1e-fips 11 Feb 2013
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 51: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to xxxx.xxxx.xxxx [123.123.123.123] port 111.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load
"/run/media/kiosk/71ad235a-3765-4a80-9971-6b602e8e9c28/my.key" as a RSA1
public key
debug1: identity file
/run/media/kiosk/71ad235a-3765-4a80-9971-6b602e8e9c28/my.key type -1
debug1: identity file
/run/media/kiosk/71ad235a-3765-4a80-9971-6b602e8e9c28/my.key-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.4
debug1: Remote protocol version 2.0, remote software version
OpenSSH_6.7p1-hpn14v5
debug1: match: OpenSSH_6.7p1-hpn14v5 pat OpenSSH*
debug2: fd 3 setting O_NONBLOCK
debug3: put_host_port: [xxxx.xxxx.xxxx]:111
debug3: load_hostkeys: loading entries for host "[xxxx.xxxx.xxxx]:111" from
file "/home/kiosk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file
/home/kiosk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs:
ecdsa-sha2-nistp256-cert-v01 at openssh.com,
ecdsa-sha2-nistp384-cert-v01 at openssh.com,
ecdsa-sha2-nistp521-cert-v01 at openssh.com
,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-cert-v01 at openssh.com,
ecdsa-sha2-nistp384-cert-v01 at openssh.com,
ecdsa-sha2-nistp521-cert-v01 at openssh.com
,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
ssh-rsa-cert-v01 at openssh.com,ssh-dss-cert-v01 at openssh.com,
ssh-rsa-cert-v00 at openssh.com,ssh-dss-cert-v00 at openssh.com,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
aes128-gcm at openssh.com,aes256-gcm at openssh.com
,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,
rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
aes128-gcm at openssh.com,aes256-gcm at openssh.com
,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,
rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-ripemd160-etm at openssh.com,hmac-sha1-96-etm at openssh.com,
hmac-md5-96-etm at openssh.com,hmac-md5,hmac-sha1,umac-64 at openssh.com,
umac-128 at openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,
hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-ripemd160-etm at openssh.com,hmac-sha1-96-etm at openssh.com,
hmac-md5-96-etm at openssh.com,hmac-md5,hmac-sha1,umac-64 at openssh.com,
umac-128 at openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,
hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib at openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib at 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: curve25519-sha256 at libssh.org
,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: chacha20-poly1305 at openssh.com
,cast128-cbc,blowfish-cbc,arcfour128,aes128-cbc,aes128-ctr,
aes128-gcm at openssh.com
debug2: kex_parse_kexinit: chacha20-poly1305 at openssh.com
,cast128-cbc,blowfish-cbc,arcfour128,aes128-cbc,aes128-ctr,
aes128-gcm at openssh.com
debug2: kex_parse_kexinit: hmac-sha1-etm at openssh.com,
hmac-sha1-96-etm at openssh.com,umac-64-etm at openssh.com
,hmac-md5-96,hmac-ripemd160,hmac-sha1-96
debug2: kex_parse_kexinit: hmac-sha1-etm at openssh.com,
hmac-sha1-96-etm at openssh.com,umac-64-etm at openssh.com
,hmac-md5-96,hmac-ripemd160,hmac-sha1-96
debug2: kex_parse_kexinit: none,zlib at openssh.com
debug2: kex_parse_kexinit: none,zlib at openssh.com
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-sha1-etm at openssh.com
debug1: kex: server->client aes128-ctr hmac-sha1-etm at openssh.com none
debug2: mac_setup: found hmac-sha1-etm at openssh.com
debug1: kex: client->server aes128-ctr hmac-sha1-etm at openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA
c4:67:d3:7d:93:af:d8:23:e4:1f:9b:66:9b:c5:b8:13
debug3: put_host_port: [xxxx.xxxx.xxxx]:111
debug3: put_host_port: [xxxx.xxxx.xxxx]:111
debug3: load_hostkeys: loading entries for host "[xxxx.xxxx.xxxx]:111" from
file "/home/kiosk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file
/home/kiosk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "[xxxx.xxxx.xxxx]:111" from
file "/home/kiosk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file
/home/kiosk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug1: Host '[xxxx.xxxx.xxxx]:111' is known and matches the ECDSA host key.
debug1: Found key in /home/kiosk/.ssh/known_hosts:1
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: /run/media/kiosk/71ad235a-3765-4a80-9971-6b602e8e9c28/my.key
((nil)), explicit
debug1: Authentications that can continue: publickey,keyboard-interactive
debug3: start over, passed a different list publickey,keyboard-interactive
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:
/run/media/kiosk/71ad235a-3765-4a80-9971-6b602e8e9c28/my.key
debug1: read PEM private key done: type RSA
debug3: sign_and_send_pubkey: RSA
97:5a:4d:07:ee:9a:e3:e9:8f:4d:f3:8b:7b:4f:c4:57
debug2: we sent a publickey packet, wait for reply
debug1: Authentication succeeded (publickey).
Authenticated to xxxx.xxxx.xxxx ([xxxx.xxxx.xxxx]:111).
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Requesting no-more-sessions at openssh.com
debug1: Entering interactive session.
debug1: SSH2_MSG_KEXINIT received
debug1: SSH2_MSG_KEXINIT sent
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-cert-v01 at openssh.com,
ecdsa-sha2-nistp384-cert-v01 at openssh.com,
ecdsa-sha2-nistp521-cert-v01 at openssh.com
,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,
ssh-rsa-cert-v01 at openssh.com,ssh-dss-cert-v01 at openssh.com,
ssh-rsa-cert-v00 at openssh.com,ssh-dss-cert-v00 at openssh.com,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
aes128-gcm at openssh.com,aes256-gcm at openssh.com
,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,
rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
aes128-gcm at openssh.com,aes256-gcm at openssh.com
,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,
rijndael-cbc at lysator.liu.se
debug2: kex_parse_kexinit: hmac-md5-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-ripemd160-etm at openssh.com,hmac-sha1-96-etm at openssh.com,
hmac-md5-96-etm at openssh.com,hmac-md5,hmac-sha1,umac-64 at openssh.com,
umac-128 at openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,
hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5-etm at openssh.com,
hmac-sha1-etm at openssh.com,umac-64-etm at openssh.com,umac-128-etm at openssh.com,
hmac-sha2-256-etm at openssh.com,hmac-sha2-512-etm at openssh.com,
hmac-ripemd160-etm at openssh.com,hmac-sha1-96-etm at openssh.com,
hmac-md5-96-etm at openssh.com,hmac-md5,hmac-sha1,umac-64 at openssh.com,
umac-128 at openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,
hmac-ripemd160 at openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,zlib at openssh.com,zlib
debug2: kex_parse_kexinit: none,zlib at 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: curve25519-sha256 at libssh.org
,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519
debug2: kex_parse_kexinit: chacha20-poly1305 at openssh.com
,cast128-cbc,blowfish-cbc,arcfour128,aes128-cbc,aes128-ctr,
aes128-gcm at openssh.com
debug2: kex_parse_kexinit: chacha20-poly1305 at openssh.com
,cast128-cbc,blowfish-cbc,arcfour128,aes128-cbc,aes128-ctr,
aes128-gcm at openssh.com
debug2: kex_parse_kexinit: hmac-sha1-etm at openssh.com,
hmac-sha1-96-etm at openssh.com,umac-64-etm at openssh.com
,hmac-md5-96,hmac-ripemd160,hmac-sha1-96
debug2: kex_parse_kexinit: hmac-sha1-etm at openssh.com,
hmac-sha1-96-etm at openssh.com,umac-64-etm at openssh.com
,hmac-md5-96,hmac-ripemd160,hmac-sha1-96
debug2: kex_parse_kexinit: none,zlib at openssh.com
debug2: kex_parse_kexinit: none,zlib at openssh.com
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-sha1-etm at openssh.com
debug1: kex: server->client aes128-ctr hmac-sha1-etm at openssh.com none
debug2: mac_setup: found hmac-sha1-etm at openssh.com
debug1: kex: client->server aes128-ctr hmac-sha1-etm at openssh.com none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA
c4:67:d3:7d:93:af:d8:23:e4:1f:9b:66:9b:c5:b8:13
debug3: put_host_port: [xxxx.xxxx.xxxx]:111
debug3: put_host_port: [xxxx.xxxx.xxxx]:111
debug3: load_hostkeys: loading entries for host "[xxxx.xxxx.xxxx]:111" from
file "/home/kiosk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file
/home/kiosk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "[xxxx.xxxx.xxxx]:111" from
file "/home/kiosk/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file
/home/kiosk/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys
debug1: Host '[xxxx.xxxx.xxxx]:111' is known and matches the ECDSA host key.
debug1: Found key in /home/kiosk/.ssh/known_hosts:1
debug1: ssh_ecdsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: set_newkeys: rekeying
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: set_newkeys: rekeying
debug1: SSH2_MSG_NEWKEYS received
debug2: callback start
debug2: x11_get_proto: /usr/bin/xauth  list :0 2>/dev/null
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 1
debug2: fd 3 setting TCP_NODELAY
debug3: packet_set_tos: set IP_TOS 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 XDG_SESSION_ID
debug3: Ignored env DBUS_STARTER_ADDRESS
debug3: Ignored env GPG_AGENT_INFO
debug3: Ignored env TERM
debug3: Ignored env SHELL
debug3: Ignored env XDG_MENU_PREFIX
debug3: Ignored env VTE_VERSION
debug3: Ignored env WINDOWID
debug3: Ignored env GNOME_KEYRING_CONTROL
debug3: Ignored env USER
debug3: Ignored env LS_COLORS
debug3: Ignored env SSH_AUTH_SOCK
debug3: Ignored env SESSION_MANAGER
debug3: Ignored env USERNAME
debug3: Ignored env PATH
debug3: Ignored env DESKTOP_SESSION
debug3: Ignored env PWD
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 0: request env confirm 0
debug3: Ignored env GDM_LANG
debug3: Ignored env GDMSESSION
debug3: Ignored env DBUS_STARTER_BUS_TYPE
debug3: Ignored env HOME
debug3: Ignored env XDG_SEAT
debug3: Ignored env SHLVL
debug3: Ignored env GNOME_DESKTOP_SESSION_ID
debug3: Ignored env LOGNAME
debug3: Ignored env DBUS_SESSION_BUS_ADDRESS
debug3: Ignored env LESSOPEN
debug3: Ignored env WINDOWPATH
debug3: Ignored env XDG_RUNTIME_DIR
debug3: Ignored env DISPLAY
debug3: Ignored env COLORTERM
debug3: Ignored env XAUTHORITY
debug3: Ignored env _
debug2: channel 0: request shell confirm 1
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug2: channel_input_status_confirm: type 99 id 0
debug2: X11 forwarding request accepted on channel 0
debug2: channel_input_status_confirm: type 99 id 0
debug2: PTY allocation request accepted on channel 0
debug2: channel 0: rcvd adjust 87380
debug2: channel_input_status_confirm: type 99 id 0
debug2: shell request accepted on channel 0
Last login: Sun May 24 10:53:28 2015 from x.x.x.x
de at DESKTOP_MINER ~ $ kwrite
debug1: client_input_channel_open: ctype x11 rchan 3 win 87380 max 16384
debug1: client_request_x11: request from 127.0.0.1 46768
debug2: fd 7 setting O_NONBLOCK
debug3: fd 7 is O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug2: X11 connection uses different authentication protocol.
X11 connection rejected because of wrong authentication.
debug2: X11 rejected 1 i0/o0
debug2: channel 1: read failed
debug2: channel 1: close_read
debug2: channel 1: input open -> drain
debug2: channel 1: ibuf empty
debug2: channel 1: send eof
debug2: channel 1: input drain -> closed
debug2: channel 1: write failed
debug2: channel 1: close_write
debug2: channel 1: output open -> closed
debug2: X11 closed 1 i3/o3
debug2: channel 1: send close
debug2: channel 1: rcvd close
debug2: channel 1: is dead
debug2: channel 1: garbage collecting
debug1: channel 1: free: x11, nchannels 2
debug3: channel 1: status: The following connections are open:
  #0 client-session (t4 r0 i0/0 o0/0 fd 4/5 cc -1)
  #1 x11 (t7 r3 i3/0 o3/0 fd 7/7 cc -1)

kwrite: cannot connect to X server DESKTOP_MINER:11.0

Ok, got it.

"X11 connection uses different authentication protocol."

Please suggest. I'm also looking at it on my end.