xref: /src/crypto/external/bsd/openssh/dist/sshd_config

#	$NetBSD: sshd_config,v 1.31 2026/09/21 21:31:00 christos Exp $
#	$OpenBSD: sshd_config,v 1.106 2026/07/10 17:21:19 naddy Exp $

# 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 /etc/ssh/ssh_host_rsa_key
#HostKey /etc/ssh/ssh_host_ecdsa_key
#HostKey /etc/ssh/ssh_host_ed25519_key
#HostKey /etc/ssh/ssh_host_mldsa44_ed25519_key

# Ciphers and keying
#RekeyLimit default none

# Logging
#SyslogFacility AUTH
#LogLevel INFO

# Authentication:

# For slow CPUs, bumped from 2 minutes to 10
LoginGraceTime 600
#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

#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 password authentication, you must BOTH
# (a) set PasswordAuthentication to "no", AND
# (b) set KbdInteractiveAuthentication to "no", or set UsePAM to "no",
#     or disable all password-based auth modules in /etc/pam.d/sshd.
# Alternatively, you can configure AuthenticationMethods with a
# specific list of methods excluding "password" and
# "keyboard-interactive".
#PasswordAuthentication yes
#PermitEmptyPasswords no

# Change to "no" to disable keyboard-interactive authentication.  Depending on
# the system's configuration, this may involve passwords, challenge-response,
# one-time passwords or some combination of these and other methods.
#KbdInteractiveAuthentication yes

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

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials 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 settings.  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 no
# If you use xorg from pkgsrc then uncomment the following line.
#XAuthLocation /usr/pkg/bin/xauth
#X11DisplayOffset 10
#X11UseLocalhost yes
#PermitTTY yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#PermitUserEnvironment no
#Compression delayed
#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

# here are the new patched ldap related tokens
# entries in your LDAP must have posixAccount & ldapPublicKey objectclass
#UseLPK yes
#LpkLdapConf /etc/ldap.conf
#LpkServers  ldap://10.1.7.1/ ldap://10.1.7.2/
#LpkUserDN   ou=users,dc=phear,dc=org
#LpkGroupDN  ou=groups,dc=phear,dc=org
#LpkBindDN cn=Manager,dc=phear,dc=org
#LpkBindPw secret
#LpkServerGroup mail
#LpkFilter (hostAccess=master.phear.org)
#LpkForceTLS no
#LpkSearchTimelimit 3
#LpkBindTimelimit 3
#LpkPubKeyAttr sshPublicKey

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

# the following are HPN related configuration options
# tcp receive buffer polling. disable in non autotuning kernels
#TcpRcvBufPoll yes

# allow the use of the none cipher
#NoneEnabled no

# disable hpn performance boosts.
HPNDisabled yes

# buffer size for hpn to non-hpn connections
#HPNBufferSize 2048

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