ProxyJump

[cw789]

"OpenSSH for Windows" version
7.6.0.1

Client OperatingSystem
Windows 10 Pro

What is failing
If I use ProxyJump within SSH URI Usage within my config, I'll get:
Bad stdio forwarding specification ''[192.168.0.1]:22''
Seems like it is doubled escaped.

Host jump_host
  HostName 10.0.0.1
  User root

Host destination_host
  ProxyJump jump_host
  HostName 192.168.0.1
  User root

[manojampalam]

Can you add some more details on how to do this in a simple setup? Perhaps using the local sshd endpoint as a proxyjump onto itself?

[cw789]

Of course. I've seen it generally concerns ProxyJump. So it doesn't depend on the ssh_config.

You can reproduce it simple by running ssh -J localhost localhost.

Output:

Bad stdio forwarding specification ''[localhost]:22''
ssh_exchange_identification: Connection closed by remote host

[gobbedy]

I get the same error

I use OpenSSH_for_Windows_7.6p1, and Windows 10 Education

ssh -J user1@jumphost user2@server

Bad stdio forwarding specification ''[server]:22''
ssh_exchange_identification: Connection closed by remote host

[TheLinuxNinja]

Just decided to try the native ssh in Windows 10 - and found this bug immediately. I can't access anything since the ProxyJump is required to specify the bastion to jump through. How can I help troubleshoot this?

Windows 10 Enterprise 1803 Build 17134.320
OpenSSH_for_Windows_7.6p1, LibreSSL 2.6.4

[oscarvdl]

Have the same issue on Microsoft Windows [Version 10.0.17134.471]

Bad stdio forwarding specification ''[example.com]:22''
ssh_exchange_identification: Connection closed by remote host

[cw789]

Workaround: ProxyCommand ssh -W %h:%p jump_host will also work on Windows meanwhile.

Any idea when this will be fixed? It's very irritating to have to run a find-replace every time I copy a SSH configuration from a Linux setup.

After the 1809 update, the workaround is now also no longer working for me.

PS C:\> systeminfo | findstr /B /C:"OS Name" /C:"OS Version"
OS Name:                   Microsoft Windows 10 Home
OS Version:                10.0.17763 N/A Build 17763
PS C:\> ssh myexample
CreateProcessW failed error:2
posix_spawn: No such file or directory

In my ~/.ssh/config I have this:

Host myjumphost
[...]

Host myexample
[...]
ProxyCommand ssh -W %h:%p myjumphost

[tats-u]

I'm bothered by this issue. (10 Pro 1809)

PS C:\Users\tatsu> ssh -vvv lab-dpc-tun
OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5
debug1: Reading configuration data C:\\Users\\tatsu/.ssh/config
debug1: C:\\Users\\tatsu/.ssh/config line 65: Applying options for lab-*-tun
debug1: C:\\Users\\tatsu/.ssh/config line 68: Applying options for lab-dpc-tun
debug1: C:\\Users\\tatsu/.ssh/config line 70: Applying options for lab-*
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 192.168.10.2 is address
debug1: Setting implicit ProxyCommand from ProxyJump: ssh -vvv -W '[%h]:%p' lab-dns
debug1: Executing proxy command: exec ssh -vvv -W '[192.168.10.2]:22' lab-dns
debug3: spawning "C:\\WINDOWS\\System32\\OpenSSH\\ssh -vvv -W '[192.168.10.2]:22' lab-dns"
CreateProcessW failed error:2
posix_spawn: No such file or directory

Latest OpenSSH:

PS C:\Users\tatsu> scoop install win32-openssh
Installing 'win32-openssh' (7.9.0.0p1-Beta) [64bit]
Loading OpenSSH-Win64.zip from cache
Checking hash of OpenSSH-Win64.zip ... ok.
Extracting OpenSSH-Win64.zip ... done.
Linking ~\scoop\apps\win32-openssh\current => ~\scoop\apps\win32-openssh\7.9.0.0p1-Beta
Creating shim for 'scp'.
Creating shim for 'sftp'.
Creating shim for 'sftp-server'.
Creating shim for 'ssh-add'.
Creating shim for 'ssh-agent'.
Creating shim for 'ssh-keygen'.
Creating shim for 'ssh-keyscan'.
Creating shim for 'ssh-shellhost'.
Creating shim for 'ssh'.
Creating shim for 'sshd'.
'win32-openssh' (7.9.0.0p1-Beta) was installed successfully!
Notes
-----
This is a pre-release (non-production ready)
Run 'sudo C:\Users\tatsu\scoop\apps\win32-openssh\current\install-sshd.ps1' to install sshd and ssh-agent as a service.
Run 'sudo C:\Users\tatsu\scoop\apps\win32-openssh\current\uninstall-sshd.ps1' them service.
PS C:\Users\tatsu> C:\Users\tatsu\scoop\apps\win32-openssh\7.9.0.0p1-Beta\ssh.exe -vvv lab-dpc-tun
OpenSSH_for_Windows_7.9p1, LibreSSL 2.6.5
debug1: Reading configuration data C:\\Users\\tatsu/.ssh/config
debug1: C:\\Users\\tatsu/.ssh/config line 65: Applying options for lab-*-tun
debug1: C:\\Users\\tatsu/.ssh/config line 68: Applying options for lab-dpc-tun
debug1: C:\\Users\\tatsu/.ssh/config line 70: Applying options for lab-*
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 192.168.10.2 is address
debug1: Setting implicit ProxyCommand from ProxyJump: C:\\Users\\tatsu\\scoop\\apps\\win32-openssh\\7.9.0.0p1-Beta\\ssh.exe -vvv -W '[%h]:%p' lab-dns
debug1: Executing proxy command: exec C:\\Users\\tatsu\\scoop\\apps\\win32-openssh\\7.9.0.0p1-Beta\\ssh.exe -vvv -W '[192.168.10.2]:22' lab-dns
debug3: spawning "C:\\Users\\tatsu\\scoop\\apps\\win32-openssh\\7.9.0.0p1-Beta\\ssh.exe -vvv -W '[192.168.10.2]:22' lab-dns"
debug3: spawning C:\\Users\\tatsu\\scoop\\apps\\win32-openssh\\7.9.0.0p1-Beta\\ssh.exe -vvv -W '[192.168.10.2]:22' lab-dns
debug3: w32_getpeername ERROR: not sock :2
debug1: identity file C:\\Users\\tatsu/.ssh/id_ed25519_lab type 3
debug3: Failed to open file:C:/Users/tatsu/.ssh/id_ed25519_lab-cert error:2
debug3: Failed to open file:C:/Users/tatsu/.ssh/id_ed25519_lab-cert.pub error:2
debug1: identity file C:\\Users\\tatsu/.ssh/id_ed25519_lab-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.9
Bad stdio forwarding specification ''[192.168.10.2]:22''
ssh_exchange_identification: Connection closed by remote host

Without using jump host (successfully connected):

PS C:\Users\tatsu> .\scoop\apps\win32-openssh\7.9.0.0p1-Beta\ssh.exe -vvv lab-dpc -N
OpenSSH_for_Windows_7.9p1, LibreSSL 2.6.5
debug1: Reading configuration data C:\\Users\\tatsu/.ssh/config
debug1: C:\\Users\\tatsu/.ssh/config line 51: Applying options for lab-dpc
debug1: C:\\Users\\tatsu/.ssh/config line 70: Applying options for lab-*
debug3: Failed to open file:C:/ProgramData/ssh/ssh_config error:2
debug2: resolve_canonicalize: hostname 192.168.10.2 is address
debug2: ssh_connect_direct
debug1: Connecting to 192.168.10.2 [192.168.10.2] port 22.
debug1: Connection established.
debug1: identity file C:\\Users\\tatsu/.ssh/id_ed25519_lab type 3
debug3: Failed to open file:C:/Users/tatsu/.ssh/id_ed25519_lab-cert error:2
debug3: Failed to open file:C:/Users/tatsu/.ssh/id_ed25519_lab-cert.pub error:2
debug1: identity file C:\\Users\\tatsu/.ssh/id_ed25519_lab-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_for_Windows_7.9
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.6p1 Ubuntu-4ubuntu0.1
debug1: match: OpenSSH_7.6p1 Ubuntu-4ubuntu0.1 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 192.168.10.2:22 as 'tatsu16'
debug3: hostkeys_foreach: reading file "C:\\Users\\tatsu/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\tatsu/.ssh/known_hosts:16
debug3: load_hostkeys: loaded 1 keys from 192.168.10.2
debug3: Failed to open file:C:/Users/tatsu/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@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-sha256@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-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none
debug2: compression stoc: none
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-sha256@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-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc: chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@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-poly1305@openssh.com MAC: <implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@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:[Host key]
debug3: hostkeys_foreach: reading file "C:\\Users\\tatsu/.ssh/known_hosts"
debug3: record_hostkey: found key type ECDSA in file C:\\Users\\tatsu/.ssh/known_hosts:16
debug3: load_hostkeys: loaded 1 keys from 192.168.10.2
debug3: Failed to open file:C:/Users/tatsu/.ssh/known_hosts2 error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts error:2
debug3: Failed to open file:C:/ProgramData/ssh/ssh_known_hosts2 error:2
debug1: Host '192.168.10.2' is known and matches the ECDSA host key.
debug1: Found key in C:\\Users\\tatsu/.ssh/known_hosts:16
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
debug3: unable to connect to pipe \\\\.\\pipe\\openssh-ssh-agent, error: 2
debug1: pubkey_prepare: ssh_get_authentication_socket: No such file or directory
debug1: Will attempt key: C:\\Users\\tatsu/.ssh/id_ed25519_lab ED25519 SHA256:[My key] explicit
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,rsa-sha2-256,rsa-sha2-512,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,password
debug3: start over, passed a different list publickey,password
debug3: preferred 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: C:\\Users\\tatsu/.ssh/id_ed25519_lab ED25519 SHA256:[My key] explicit
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: C:\\Users\\tatsu/.ssh/id_ed25519_lab ED25519 SHA256:[My key] explicit
debug3: sign_and_send_pubkey: ED25519 SHA256:[My key]
debug3: sign_and_send_pubkey: signing using ssh-ed25519
debug3: send packet: type 50
debug3: receive packet: type 52
debug1: Authentication succeeded (publickey).
Authenticated to 192.168.10.2 ([192.168.10.2]:22).
debug2: fd 3 setting TCP_NODELAY
debug1: Requesting no-more-sessions@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-00@openssh.com want_reply 0

[jaketyo]

I am also suffering from this issue. Does anyone have an update?

PS C:\WINDOWS\system32>  ssh -v HOSTNAME
OpenSSH_for_Windows_7.7p1, LibreSSL 2.6.5
debug1: Reading configuration data __PROGRAMDATA__\\ssh/ssh_config
debug1: __PROGRAMDATA__\\ssh/ssh_config line 1: Applying options for *
debug1: __PROGRAMDATA__\\ssh/ssh_config line 15: Applying options for artifacts
debug1: Executing proxy command: exec ssh BASTION_HOST -W HOSTNAME:22
CreateProcessW failed error:2
posix_spawn: No such file or directory

I redacted the hostnames. However, they are correct.