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Sshd config

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Whenever you edit sshd_config, you'll want to restart sshd:  /etc/rc.d/sshd restart
 
Whenever you edit sshd_config, you'll want to restart sshd:  /etc/rc.d/sshd restart
  
−
Example sshd_config file, from a newly installed 8.2-RELEASE system:
+
Example sshd_config file, from a newly installed 6.0-RELEASE system:
  
−
  # $OpenBSD: sshd_config,v 1.81 2009/10/08 14:03:41 markus Exp $
+
  #       $OpenBSD: sshd_config,v 1.72 2005/07/25 11:59:40 markus Exp $
−
  # $FreeBSD: src/crypto/openssh/sshd_config,v 1.49.2.2.4.1 2010/12/21 17:09:25 kensmith Exp $
+
  #       $FreeBSD: src/crypto/openssh/sshd_config,v 1.42.2.1 2005/09/11 16:50:35
−
  #
+
des Exp $  
 +
   
 
  # This is the sshd server system-wide configuration file.  See
 
  # This is the sshd server system-wide configuration file.  See
 
  # sshd_config(5) for more information.
 
  # sshd_config(5) for more information.
−
  # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
+
−
  #
+
  # This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin  
 +
   
 
  # The strategy used for options in the default sshd_config shipped with
 
  # The strategy used for options in the default sshd_config shipped with
 
  # OpenSSH is to specify options with their default value where
 
  # OpenSSH is to specify options with their default value where
Line 16: Line 18:
 
   
 
   
 
  # Note that some of FreeBSD's defaults differ from OpenBSD's, and
 
  # Note that some of FreeBSD's defaults differ from OpenBSD's, and
−
  # FreeBSD has a few additional options.
+
  # FreeBSD has a few additional options.  
 
   
 
   
−
  #VersionAddendum FreeBSD-20100308
+
  #VersionAddendum FreeBSD-20050903
 
   
 
   
 
  #Port 22
 
  #Port 22
 +
#Protocol 2
 
  #AddressFamily any
 
  #AddressFamily any
 
  #ListenAddress 0.0.0.0
 
  #ListenAddress 0.0.0.0
−
  #ListenAddress ::
+
  #ListenAddress ::  
−
+
−
# The default requires explicit activation of protocol 1
+
−
#Protocol 2
+
 
   
 
   
 
  # HostKey for protocol version 1
 
  # HostKey for protocol version 1
 
  #HostKey /etc/ssh/ssh_host_key
 
  #HostKey /etc/ssh/ssh_host_key
 
  # HostKeys for protocol version 2
 
  # HostKeys for protocol version 2
−
#HostKey /etc/ssh/ssh_host_rsa_key
+
  #HostKey /etc/ssh/ssh_host_dsa_key  
−
  #HostKey /etc/ssh/ssh_host_dsa_key
+
 
   
 
   
 
  # Lifetime and size of ephemeral version 1 server key
 
  # Lifetime and size of ephemeral version 1 server key
 
  #KeyRegenerationInterval 1h
 
  #KeyRegenerationInterval 1h
−
  #ServerKeyBits 1024
+
  #ServerKeyBits 768
 
   
 
   
 
  # Logging
 
  # Logging
 
  # obsoletes QuietMode and FascistLogging
 
  # obsoletes QuietMode and FascistLogging
 
  #SyslogFacility AUTH
 
  #SyslogFacility AUTH
−
  #LogLevel INFO
+
  #LogLevel INFO  
 
   
 
   
−
  # Authentication:
+
  # Authentication:  
 
   
 
   
 
  #LoginGraceTime 2m
 
  #LoginGraceTime 2m
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  #StrictModes yes
 
  #StrictModes yes
 
  #MaxAuthTries 6
 
  #MaxAuthTries 6
−
#MaxSessions 10
 
 
   
 
   
 
  #RSAAuthentication yes
 
  #RSAAuthentication yes
 
  #PubkeyAuthentication yes
 
  #PubkeyAuthentication yes
−
  #AuthorizedKeysFile .ssh/authorized_keys
+
  #AuthorizedKeysFile     .ssh/authorized_keys
 
   
 
   
 
  # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
 
  # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
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  #IgnoreUserKnownHosts no
 
  #IgnoreUserKnownHosts no
 
  # Don't read the user's ~/.rhosts and ~/.shosts files
 
  # Don't read the user's ~/.rhosts and ~/.shosts files
−
  #IgnoreRhosts yes
+
  #IgnoreRhosts yes  
 
   
 
   
 
  # Change to yes to enable built-in password authentication.
 
  # Change to yes to enable built-in password authentication.
 
  #PasswordAuthentication no
 
  #PasswordAuthentication no
−
  #PermitEmptyPasswords no
+
  #PermitEmptyPasswords no  
 
   
 
   
 
  # Change to no to disable PAM authentication
 
  # Change to no to disable PAM authentication
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  #KerberosOrLocalPasswd yes
 
  #KerberosOrLocalPasswd yes
 
  #KerberosTicketCleanup yes
 
  #KerberosTicketCleanup yes
−
  #KerberosGetAFSToken no
+
  #KerberosGetAFSToken no  
 
   
 
   
 
  # GSSAPI options
 
  # GSSAPI options
 
  #GSSAPIAuthentication no
 
  #GSSAPIAuthentication no
−
  #GSSAPICleanupCredentials yes
+
  #GSSAPICleanupCredentials yes  
 
   
 
   
 
  # Set this to 'no' to disable PAM authentication, account processing,
 
  # Set this to 'no' to disable PAM authentication, account processing,
−
  # and session processing. If this is enabled, PAM authentication will  
+
  # and session processing. If this is enabled, PAM authentication will
−
  # be allowed through the ChallengeResponseAuthentication and
+
  # be allowed through the ChallengeResponseAuthentication mechanism.
−
  # PasswordAuthentication.  Depending on your PAM configuration,
+
  # Depending on your PAM configuration, this may bypass the setting of
−
  # PAM authentication via ChallengeResponseAuthentication may bypass
+
  # PasswordAuthentication, PermitEmptyPasswords, and
−
  # the setting of "PermitRootLogin without-password".
+
  # "PermitRootLogin without-password". If you just want the PAM account and
−
# If you just want the PAM account and session checks to run without
+
# session checks to run without PAM authentication, then enable this but set
−
# PAM authentication, then enable this but set PasswordAuthentication
+
  # ChallengeResponseAuthentication=no
−
  # and ChallengeResponseAuthentication to 'no'.
+
 
  #UsePAM yes
 
  #UsePAM yes
 
   
 
   
−
#AllowAgentForwarding yes
 
 
  #AllowTcpForwarding yes
 
  #AllowTcpForwarding yes
 
  #GatewayPorts no
 
  #GatewayPorts no
Line 111: Line 107:
 
  #PidFile /var/run/sshd.pid
 
  #PidFile /var/run/sshd.pid
 
  #MaxStartups 10
 
  #MaxStartups 10
−
#PermitTunnel no
 
−
#ChrootDirectory none
 
 
   
 
   
 
  # no default banner path
 
  # no default banner path
−
  #Banner none
+
  #Banner /some/path
−
+
 
 
  # override default of no subsystems
 
  # override default of no subsystems
−
  Subsystem sftp /usr/libexec/sftp-server
+
  Subsystem       sftp   /usr/libexec/sftp-server
−
#
+
−
# Example of overriding settings on a per-user basis
+
−
#Match User anoncvs
+
−
# X11Forwarding no
+
−
# AllowTcpForwarding no
+
−
# ForceCommand cvs server
+
−
 
+
  
 
[[Category:Important Config Files]]
 
[[Category:Important Config Files]]

Latest revision as of 17:04, 1 August 2011

Whenever you edit sshd_config, you'll want to restart sshd: /etc/rc.d/sshd restart

Example sshd_config file, from a newly installed 6.0-RELEASE system: 

#       $OpenBSD: sshd_config,v 1.72 2005/07/25 11:59:40 markus Exp $
#       $FreeBSD: src/crypto/openssh/sshd_config,v 1.42.2.1 2005/09/11 16:50:35
des Exp $ 

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

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

# 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 change a
# default value.

# Note that some of FreeBSD's defaults differ from OpenBSD's, and
# FreeBSD has a few additional options. 

#VersionAddendum FreeBSD-20050903 

#Port 22
#Protocol 2
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress :: 

# HostKey for protocol version 1
#HostKey /etc/ssh/ssh_host_key
# HostKeys for protocol version 2
#HostKey /etc/ssh/ssh_host_dsa_key 

# Lifetime and size of ephemeral version 1 server key
#KeyRegenerationInterval 1h
#ServerKeyBits 768 

# Logging
# obsoletes QuietMode and FascistLogging
#SyslogFacility AUTH
#LogLevel INFO 

# Authentication: 

#LoginGraceTime 2m
#PermitRootLogin no
#StrictModes yes
#MaxAuthTries 6

#RSAAuthentication yes
#PubkeyAuthentication yes
#AuthorizedKeysFile     .ssh/authorized_keys

# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
#RhostsRSAAuthentication no
# similar for protocol version 2
#HostbasedAuthentication no
# Change to yes if you don't trust ~/.ssh/known_hosts for
# RhostsRSAAuthentication and HostbasedAuthentication
#IgnoreUserKnownHosts no
# Don't read the user's ~/.rhosts and ~/.shosts files
#IgnoreRhosts yes 

# Change to yes to enable built-in password authentication.
#PasswordAuthentication no
#PermitEmptyPasswords no 

# Change to no to disable PAM authentication
#ChallengeResponseAuthentication yes

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

# GSSAPI options
#GSSAPIAuthentication no
#GSSAPICleanupCredentials yes 

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

#AllowTcpForwarding yes
#GatewayPorts no
#X11Forwarding yes
#X11DisplayOffset 10
#X11UseLocalhost yes
#PrintMotd yes
#PrintLastLog yes
#TCPKeepAlive yes
#UseLogin no
#UsePrivilegeSeparation yes
#PermitUserEnvironment no
#Compression delayed
#ClientAliveInterval 0
#ClientAliveCountMax 3
#UseDNS yes
#PidFile /var/run/sshd.pid
#MaxStartups 10

# no default banner path
#Banner /some/path 
 
# override default of no subsystems
Subsystem       sftp    /usr/libexec/sftp-server
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