This properly belongs on the ssh group, but posting there has not gotten
any responses... and the list is quite slow to boot.
I like using ssh -X to other lan remotes but with new versions of openssh
or perhaps the configs, it only works 1 way.
I can `ssh -X' to the gentoo host from a debian host but not the other
way round.
Two different versions of openssh appear to be involved. But not sure
how different they are.
RHOST=a debian HOST
LHOST= Gentoo HOST
ssh -vN $RHOST 2>&1|grep "remote software version"
[...] OpenSSH_6.7p1 Debian-3
ssh -vN $LHOST 2>&1|grep "remote software version"
[...] OpenSSH_6.7p1-hpn14v5
One thing I tried to do was to copy the RHOST sshd_config and ssh_config to
LHOST. Restart and try again... there were a few incompatible bits in
the files so after commenting a few out until no config errors.
However ssh -X still displayed the error and would NOT work when:
ssh -X RHOST from LHOST
({Note that plain ssh LHOST or RHOST works in any direction}
Error outut with ssh -X $RHOST "xterm"
,----
| Warning: untrusted X11 forwarding setup failed: xauth key data not generated
| Warning: No xauth data; using fake authentication data for X11 forwarding.
| Invalid MIT-MAGIC-COOKIE-1 keyxterm: Xt error: Can't open display:
localhost:10.0
`----
[Full Error output with ssh -vv -X is very lengthy so is attached at the end]
I'm not seeing how to debug this further. So going back to the stock
version of sshd_config ssh_config on gentoo with two changes:
commented out this line:
PasswordAuthentication no
added this:
X11Forwarding yes
------- ------- ---=--- ------- -------
Full sshd_config on LHOST: sudo grep ^[^#] /etc/ssh/sshd_config
------- ------- ---=--- ------- -------
UsePAM yes
X11Forwarding yes
PrintMotd no
PrintLastLog no
UsePrivilegeSeparation sandbox # Default for new installations.
Subsystem sftp /usr/lib/misc/sftp-server
AcceptEnv LANG LC_*
------- Config END -------
------- ------- ---=--- ------- -------
Full ssh_config on LHOST: sudo grep ^[^#] /etc/ssh/ssh_config
------- ------- ---=--- ------- -------
ForwardX11 yes
SendEnv LANG LC_*
------- Config END -------
#######################################################
Now the same info for RHOST
------- ------- ---=--- ------- -------
Full sshd_config on RHOST: ssh root@RHOST "grep ^[^#] /etc/ssh/sshd_config"
------- ------- ---=--- ------- -------
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
AcceptEnv LANG LC_*
ChallengeResponseAuthentication no
IgnoreRhosts yes
HostbasedAuthentication no
KeyRegenerationInterval 3600
LogLevel INFO
LoginGraceTime 120
PermitEmptyPasswords no
PermitRootLogin yes
Port 22
PrintLastLog yes
PrintMotd no
Protocol 2
PubkeyAuthentication yes
RSAAuthentication yes
RhostsRSAAuthentication no
ServerKeyBits 1024
SyslogFacility AUTH
StrictModes yes
Subsystem sftp /usr/lib/misc/sftp-server
TCPKeepAlive yes
UsePAM yes
UsePrivilegeSeparation sandbox
X11Forwarding yes
------- Config END -------
------- ------- ---=--- ------- -------
Full ssh_config on RHOST: ssh root@RHOST "grep ^[^#] /etc/ssh/ssh_config"
------- ------- ---=--- ------- -------
Host *
ForwardX11 yes
SendEnv LANG LC_*
HashKnownHosts yes
------- Config END -------
############################################
############################################
The only thing more I can think to include is the full lengthy output of
ssh -vv -X
HOST:gv ~
harry > ssh -vv -X harry@dv 'xterm'
OpenSSH_6.7p1-hpn14v5, OpenSSL 1.0.1j 15 Oct 2014
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 20: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to dv [192.168.0.5] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /home/harry/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.7p1-hpn14v5
debug1: Remote protocol version 2.0, remote software version OpenSSH_6.7p1
Debian-3
debug1: Remote is NON-HPN aware
debug1: match: OpenSSH_6.7p1 Debian-3 pat OpenSSH* compat 0x24000000
debug2: fd 3 setting O_NONBLOCK
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: AUTH STATE IS 0
debug2: kex_parse_kexinit:
[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit:
[email protected],ssh-ed25519,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],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:
[email protected],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,ssh-ed25519
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
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 [email protected]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: setup [email protected]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ED25519 78:0a:64:ae:48:55:a2:32:f2:ce:75:01:b4:ee:fa:21
debug1: Host 'dv' is known and matches the ED25519 host key.
debug1: Found key in /home/harry/.ssh/known_hosts:2
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: /home/harry/.ssh/id_rsa ((nil)),
debug2: key: /home/harry/.ssh/id_dsa ((nil)),
debug2: key: /home/harry/.ssh/id_ecdsa ((nil)),
debug2: key: /home/harry/.ssh/id_ed25519 ((nil)),
debug1: Authentications that can continue: publickey,password
debug1: Next authentication method: publickey
debug1: Trying private key: /home/harry/.ssh/id_rsa
debug1: Trying private key: /home/harry/.ssh/id_dsa
debug1: Trying private key: /home/harry/.ssh/id_ecdsa
debug1: Trying private key: /home/harry/.ssh/id_ed25519
debug2: we did not send a packet, disable method
debug1: Next authentication method: password
harry@dv's password:
debug2: we sent a password packet, wait for reply
debug1: Single to Multithread CTR cipher swap - client request
debug1: Authentication succeeded (password).
Authenticated to dv ([192.168.0.5]:22).
debug1: HPN to Non-HPN Connection
debug1: Final hpn_buffer_size = 2097152
debug1: HPN Disabled: 0, HPN Buffer Size: 2097152
debug1: channel 0: new [client-session]
debug1: Enabled Dynamic Window Scaling
debug2: channel 0: send open
debug1: Requesting [email protected]
debug1: Entering interactive session.
debug1: need rekeying
debug1: SSH2_MSG_KEXINIT sent
debug1: rekeying in progress
debug2: callback start
debug2: x11_get_proto: /usr/bin/xauth -f /tmp/ssh-qqfAyxQhvSOr/xauthfile
generate :0.0 MIT-MAGIC-COOKIE-1 untrusted timeout 1200 2>/dev/null
Warning: untrusted X11 forwarding setup failed: xauth key data not generated
Warning: No xauth data; using fake authentication data for X11 forwarding.
debug1: Requesting X11 forwarding with authentication spoofing.
debug2: channel 0: request x11-req confirm 1
debug1: enqueue packet: 98
debug2: fd 3 setting TCP_NODELAY/SCTP_NODELAY
debug2: client_session2_setup: id 0
debug1: Sending environment.
debug1: Sending command: xterm
debug2: channel 0: request exec confirm 1
debug1: enqueue packet: 98
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
debug1: SSH2_MSG_KEXINIT received
debug1: AUTH STATE IS 1
debug2: kex_parse_kexinit:
[email protected],ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit:
[email protected],ssh-ed25519,[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-rsa,ssh-dss
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected],arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[email protected]
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1,[email protected],[email protected],[email protected],[email protected],hmac-md5,hmac-ripemd160,[email protected],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[email protected],zlib
debug2: kex_parse_kexinit: none,[email protected],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:
[email protected],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,ssh-ed25519
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit:
aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected],[email protected]
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit:
[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: kex_parse_kexinit: none,[email protected]
debug2: kex_parse_kexinit: none,[email protected]
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 [email protected]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: server->client aes128-ctr [email protected] none
debug2: mac_setup: setup [email protected]
debug1: REQUESTED ENC.NAME is 'aes128-ctr'
debug1: kex: client->server aes128-ctr [email protected] none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ED25519 78:0a:64:ae:48:55:a2:32:f2:ce:75:01:b4:ee:fa:21
debug1: verify_host_key: server host key matches cached key
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: set_newkeys: rekeying
debug1: spawned a thread
debug1: spawned a thread
debug1: dequeue packet: 98
debug1: dequeue packet: 98
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug2: set_newkeys: mode 0
debug1: set_newkeys: rekeying
debug1: spawned a thread
debug1: spawned a thread
debug1: SSH2_MSG_NEWKEYS received
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel_input_status_confirm: type 99 id 0
debug2: X11 forwarding request accepted on channel 0
debug2: channel 0: rcvd adjust 2097152
debug2: channel_input_status_confirm: type 99 id 0
debug2: exec request accepted on channel 0
debug2: tcpwinsz: 318720 for connection: 3
debug1: client_input_channel_open: ctype x11 rchan 3 win 65536 max 16384
debug1: client_request_x11: request from 127.0.0.1 41191
debug2: fd 7 setting O_NONBLOCK
debug1: channel 1: new [x11]
debug1: confirm x11
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 1: read<=0 rfd 7 len 0
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: tcpwinsz: 318720 for connection: 3
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 0: rcvd ext data 30
debug2: channel 1: rcvd eof
debug2: channel 1: output open -> drain
debug2: channel 1: obuf empty
debug2: channel 1: close_write
debug2: channel 1: output drain -> closed
debug2: channel 0: rcvd ext data 7
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 1: send close
Invalid MIT-MAGIC-COOKIE-1 keyxterm: debug2: channel 0: written 37 to efd 6
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 1: rcvd close
debug2: channel 0: rcvd ext data 45
debug2: channel 0: rcvd eof
debug2: channel 0: output open -> drain
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype [email protected] reply 0
debug2: channel 0: rcvd eow
debug2: channel 0: close_read
debug2: channel 0: input open -> closed
debug2: channel 0: rcvd close
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 0: obuf_empty delayed efd 6/(45)
debug2: channel 1: is dead
debug2: channel 1: garbage collecting
debug1: channel 1: free: x11, nchannels 2
Xt error: Can't open display: localhost:10.0
debug2: channel 0: written 45 to efd 6
debug2: tcpwinsz: 318720 for connection: 3
debug2: channel 0: obuf empty
debug2: channel 0: close_write
debug2: channel 0: output drain -> closed
debug2: channel 0: almost dead
debug2: channel 0: gc: notify user
debug2: channel 0: gc: user detached
debug2: channel 0: send close
debug2: channel 0: is dead
debug2: channel 0: garbage collecting
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 4756, received 2908 bytes, in 0.2 seconds
Bytes per second: sent 30810.3, received 18838.6
debug1: Exit status 1
