I'm trying to setup my Windows 10 machine to be an ssh server by using Win32-OpenSSH. The server is part of a domain, so I use the command
ssh -i ~/.ssh/id_rsa -l user@domain ip_address
to connect from my ssh client.
This gives an error "Permission denied (publickey,keyboard-interactive)". On the server side, the log reads
sshd: Invalid user user@domain from ip_address port 59676
sshd: Connection closed by invalid user user@domain ip_address port 59676 [preauth]
I have also tried the following variation on the ssh command
ssh -i ~/.ssh/id_rsa domain/user@ip_address
to try to connect from the client side. I get a "Connection reset by ip_address port 22" error.
If I look at the log on the server side, it says:
sshd: error: lookup_principal_name: User principal name lookup failed for user 'domain\user' (explicit: 5, implicit: 5)"
sshd: error: get_user_token - unable to generate token on 2nd attempt for user domain\user
sshd: fatal: ga_init, unable to resolve user domain\user
How can I resolve this error?
Details
On the server (Windows 10) side:
whoami confirms that my username is domain\user
I'd like to use public key authentication only, so I set the permissions in sshd_config to
PubkeyAuthentication yes
PasswordAuthentication no
All other settings are default. The full sshd_config file follows
# 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
PubkeyAuthentication yes
PasswordAuthentication no
# GSSAPI options
#GSSAPIAuthentication 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
I have the id_rsa.pub appended to the authorized_keys file in the C:\Users\user\.ssh directory. icacls .\authorized_keys returns
C:\Users\user\\.ssh\authorized_keys NT AUTHORITY\SYSTEM:(I)(F)
BUILTIN\Administrators:(I)(F)
DOMAIN\user:(I)(F)
On the client (Ubuntu 20.04.3) side:
~/.ssh/id_rsa has the following permissions
-rw------- 1 ubuntu ubuntu 2655 Dec 30 18:16 id_rsa
-rw-r--r-- 1 ubuntu ubuntu 576 Dec 30 18:16 id_rsa.pub
$env:USERPROFILE\.ssh