cannot login into localhost openssh server

Question

I installed openssh server into my windows 11 machine:

output of Get-Service -Name sshd:

Status   Name               DisplayName  
------   ----               -----------  
Running  sshd               OpenSSH SSH Server

When I try to login to my account, it will say this:

PS C:\Users\filip> ssh localhost
filip@localhost's password:
Permission denied, please try again.

I tried it with my second account with administrator privileges, same thing.

PS C:\Users\filip> ssh admin@localhost
admin@localhost's password:
Permission denied, please try again.

I looked into Windows logs, it says this:

sshd: Failed password for invalid user filip from 127.0.0.1 port 55252 ssh2

sshd: Failed password for invalid user admin from 127.0.0.1 port 62548 ssh2

I checked, if my account has valid shell:

PS C:\Users\admin> Get-LocalUser -Name filip | Select-Object -ExpandProperty ObjectClass
User

I looked into sshd_config, but I did not found anything that could cause this problem:

# 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

# 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

Answer 1

This line is restricting any session to SFTP. Try commenting that out since you are logging in via SSH. Or use sftp.exe instead of ssh.exe.

Subsystem sftp sftp-server.exe

I think you would also need to identify who can log on. Under Authentication, define either a group or users.

# Authentication:
#Allowgroups Administrators  SSH-Users
Allowusers filip admin