ssh - Connection reset by ::1 port 22 (Windows 10 + PowerShell/cmd + OpenSSH)

Question

I'm a host Windows 10 (version 20H2, build 19042.746), with WSL2 installed (like here: https://docs.microsoft.com/en-us/windows/wsl/install-win10).

After I installed the OpenSSH (like here: https://docs.microsoft.com/en-us/windows-server/administration/openssh/openssh_install_firstuse and https://www.hanselman.com/blog/the-easy-way-how-to-ssh-into-bash-and-wsl2-on-windows-10-from-an-external-machine), with these commands in PowerShell as admin:

> Get-WindowsCapability -Online | ? Name -like 'OpenSSH*'

Name  : OpenSSH.Client~~~~0.0.1.0
State : Installed

Name  : OpenSSH.Server~~~~0.0.1.0
State : NotPresent

> Add-WindowsCapability -Online -Name OpenSSH.Server~~~~0.0.1.0
> Start-Service sshd
> Get-Service sshd
> Set-Service -Name sshd -StartupType 'Automatic'
> New-ItemProperty -Path "HKLM:SOFTWAREOpenSSH" -Name DefaultShell -Value "C:WindowsSystem32ash.exe"
> Get-WindowsCapability -Online | ? Name -like 'OpenSSH*'

Name  : OpenSSH.Client~~~~0.0.1.0
State : Installed

Name  : OpenSSH.Server~~~~0.0.1.0
State : Installed

I checked that the Windows Firewall includes service OpenSSH as an active and open Inbound Rule.

I checked with telnet too:

> telnet localhost 22
SSH-2.0-OpenSSH_for_Windows_7.7

Until here seems all is ok!

Now the problem happens, running the command also in PowerShell (or in cmd):

> ssh localhost
Connection reset by ::1 port 22

Did anyone have the same problem (running in: Windows 10 + PowerShell/cmd + OpenSSH)?

Does anyone know why this problem happened?

Does anyone know how to solve this problem?

Thanks!

============= MORE INFOS =============

Follow another command to debug:

> sshd -d
debug1: sshd version OpenSSH_for_Windows_7.7, LibreSSL 2.6.5
debug1: key_load_private: Permission denied
debug1: key_load_public: Permission denied
Could not load host key: __PROGRAMDATA__\ssh/ssh_host_rsa_key
debug1: key_load_private: Permission denied
debug1: key_load_public: Permission denied
Could not load host key: __PROGRAMDATA__\ssh/ssh_host_ecdsa_key
debug1: key_load_private: Permission denied
debug1: key_load_public: Permission denied
Could not load host key: __PROGRAMDATA__\ssh/ssh_host_ed25519_key
sshd: no hostkeys available -- exiting.

The __PROGRAMDATA__ seems to refer to Windows environment variable %PROGRAMDATA%, that point to C:ProgramData.

> ls C:ProgramDatassh

    Diretório: C:ProgramDatassh


Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----        25/01/2021     19:59                logs
-a----        27/01/2021     02:03           2252 sshd_config
-a----        25/01/2021     19:59            668 ssh_host_dsa_key
-a----        25/01/2021     19:59            628 ssh_host_dsa_key.pub
-a----        25/01/2021     19:59            227 ssh_host_ecdsa_key
-a----        25/01/2021     19:59            200 ssh_host_ecdsa_key.pub
-a----        25/01/2021     19:59            432 ssh_host_ed25519_key
-a----        25/01/2021     19:59            120 ssh_host_ed25519_key.pub
-a----        25/01/2021     19:59            420 ssh_host_rsa_key.pub

Follow the content from sshd config:

> cat C:WINDOWSSystem32OpenSSHsshd_config_default
# This is the sshd server system-wide configuration file.  See
# sshd_config(5) for more information.

# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented.  Uncommented options override the
# default value.

#Port 22
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::

#HostKey __PROGRAMDATA__/ssh/ssh_host_rsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_dsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_ecdsa_key
#HostKey __PROGRAMDATA__/ssh/ssh_host_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

#LoginGraceTime 2m
#PermitRootLogin prohibit-password
#StrictModes yes
#MaxAuthTries 6
#MaxSessions 10

#PubkeyAuthentication yes

# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
# but this is overridden so installations will only check .ssh/authorized_keys
AuthorizedKeysFile      .ssh/authorized_keys

#AuthorizedPrincipalsFile none

# For this to work you will also need host keys in %programData%/ssh/ssh_known_hosts
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes

# To disable tunneled clear text passwords, change to no here!
PasswordAuthentication yes
#PermitEmptyPasswords no

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
#PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#PermitUserEnvironment no
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /var/run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

# no default banner path
#Banner none

# override default of no subsystems
Subsystem       sftp    sftp-server.exe

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       AllowTcpForwarding no
#       PermitTTY no
#       ForceCommand cvs server

Match Group administrators
       AuthorizedKeysFile __PROGRAMDATA__/ssh/administrators_authorized_keys

question from:https://stackoverflow.com/questions/65921478/connection-reset-by-1-port-22-windows-10-powershell-cmd-openssh

Answer 1

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