# /etc/sssd/sssd.conf
[sssd]
domains = asia.earth.local
config_file_version = 2
services = nss, pam

[domain/asia.earth.local]
default_shell = /bin/bash
krb5_store_password_if_offline = True
cache_credentials = False
krb5_realm = ASIA.EARTH.LOCAL
realmd_tags = manages-system joined-with-adcli 
id_provider = ad
fallback_homedir = /home/%u
ad_domain = asia.earth.local
use_fully_qualified_names = True
ldap_id_mapping = True
access_provider = simple
simple_allow_groups = [email protected], Domain [email protected], Domain [email protected]

# /etc/ssh/sshd_config

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

# This sshd was compiled with PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games

# 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.

Include /etc/ssh/sshd_config.d/*.conf

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

#HostKey /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/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

# Expect .ssh/authorized_keys2 to be disregarded by default in future.
#AuthorizedKeysFile     .ssh/authorized_keys .ssh/authorized_keys2

#AuthorizedPrincipalsFile none

#AuthorizedKeysCommand none
#AuthorizedKeysCommandUser nobody

# For this to work you will also need host keys in /etc/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 no
#PermitEmptyPasswords no

# Change to yes to enable challenge-response passwords (beware issues with
# some PAM modules and threads)
KbdInteractiveAuthentication no

# Kerberos options
KerberosAuthentication yes
#KerberosOrLocalPasswd yes
KerberosTicketCleanup yes
#KerberosGetAFSToken no

# GSSAPI options
GSSAPIAuthentication yes
GSSAPICleanupCredentials yes
GSSAPIStrictAcceptorCheck no
GSSAPIKeyExchange yes

# Set this to 'yes' to enable PAM authentication, account processing,
# and session processing. If this is enabled, PAM authentication will
# be allowed through the KbdInteractiveAuthentication and
# PasswordAuthentication.  Depending on your PAM configuration,
# PAM authentication via KbdInteractiveAuthentication may bypass
# the setting of "PermitRootLogin without-password".
# If you just want the PAM account and session checks to run without
# PAM authentication, then enable this but set PasswordAuthentication
# and KbdInteractiveAuthentication to 'no'.
UsePAM yes

#AllowAgentForwarding yes
#AllowTcpForwarding yes
#GatewayPorts no
X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
PrintMotd no
#PrintLastLog yes
#TCPKeepAlive yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS no
#PidFile /run/sshd.pid
#MaxStartups 10:30:100
#PermitTunnel no
#ChrootDirectory none
#VersionAddendum none

# no default banner path
#Banner none

# Allow client to pass locale environment variables
AcceptEnv LANG LC_*

# override default of no subsystems
Subsystem       sftp    /usr/lib/openssh/sftp-server

# Example of overriding settings on a per-user basis
#Match User anoncvs
#       X11Forwarding no
#       AllowTcpForwarding no
#       PermitTTY no
#       ForceCommand cvs server
PubkeyAcceptedKeyTypes=+ssh-rsa

$ klist                      
Ticket cache: FILE:/tmp/krb5cc_1000
Default principal: [email protected]

Valid starting       Expires              Service principal
07/06/2025 05:53:45  07/06/2025 15:53:45  krbtgt/[email protected]
        renew until 07/07/2025 05:53:43

$ ssh 10.5.20.74 -l root id                
uid=0(root) gid=0(root) groups=0(root)

$ kinit [email protected]
Password for [email protected]: 

$ ssh 10.5.20.74 -l testuser1234 id                
uid=1003(testuser1234) gid=1003(testuser1234) groups=1003(testuser1234)

$ ssh '[email protected]'@10.5.20.74 id
[email protected]@10.5.20.74's password: 
uid=1753602609([email protected]) gid=1753600513(domain [email protected]) groups=1753600513(domain [email protected])