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Annotation of src/usr.bin/ssh/sshd_config, Revision 1.87

1.87    ! djm         1: #      $OpenBSD: sshd_config,v 1.86 2012/04/12 02:43:55 djm Exp $
1.27      niklas      2:
1.55      stevesk     3: # This is the sshd server system-wide configuration file.  See
                      4: # sshd_config(5) for more information.
1.1       deraadt     5:
1.48      deraadt     6: # The strategy used for options in the default sshd_config shipped with
1.44      stevesk     7: # OpenSSH is to specify options with their default value where
1.83      dtucker     8: # possible, but leave them commented.  Uncommented options override the
1.44      stevesk     9: # default value.
                     10:
                     11: #Port 22
1.70      djm        12: #AddressFamily any
1.15      markus     13: #ListenAddress 0.0.0.0
                     14: #ListenAddress ::
1.75      djm        15:
1.81      markus     16: # The default requires explicit activation of protocol 1
                     17: #Protocol 2
1.40      markus     18:
                     19: # HostKey for protocol version 1
1.47      deraadt    20: #HostKey /etc/ssh/ssh_host_key
1.40      markus     21: # HostKeys for protocol version 2
1.47      deraadt    22: #HostKey /etc/ssh/ssh_host_rsa_key
                     23: #HostKey /etc/ssh/ssh_host_dsa_key
1.82      naddy      24: #HostKey /etc/ssh/ssh_host_ecdsa_key
1.40      markus     25:
                     26: # Lifetime and size of ephemeral version 1 server key
1.61      djm        27: #KeyRegenerationInterval 1h
1.80      djm        28: #ServerKeyBits 1024
1.13      markus     29:
                     30: # Logging
1.71      djm        31: # obsoletes QuietMode and FascistLogging
1.44      stevesk    32: #SyslogFacility AUTH
                     33: #LogLevel INFO
1.13      markus     34:
1.40      markus     35: # Authentication:
                     36:
1.61      djm        37: #LoginGraceTime 2m
1.44      stevesk    38: #PermitRootLogin yes
                     39: #StrictModes yes
1.69      dtucker    40: #MaxAuthTries 6
1.79      djm        41: #MaxSessions 10
1.44      stevesk    42:
                     43: #RSAAuthentication yes
                     44: #PubkeyAuthentication yes
1.84      djm        45:
                     46: # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
                     47: # but this is overridden so installations will only check .ssh/authorized_keys
                     48: AuthorizedKeysFile     .ssh/authorized_keys
1.86      djm        49:
                     50: #AuthorizedPrincipalsFile none
1.40      markus     51:
1.47      deraadt    52: # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
1.44      stevesk    53: #RhostsRSAAuthentication no
1.36      markus     54: # similar for protocol version 2
1.44      stevesk    55: #HostbasedAuthentication no
                     56: # Change to yes if you don't trust ~/.ssh/known_hosts for
                     57: # RhostsRSAAuthentication and HostbasedAuthentication
                     58: #IgnoreUserKnownHosts no
1.63      markus     59: # Don't read the user's ~/.rhosts and ~/.shosts files
                     60: #IgnoreRhosts yes
1.6       deraadt    61:
                     62: # To disable tunneled clear text passwords, change to no here!
1.44      stevesk    63: #PasswordAuthentication yes
                     64: #PermitEmptyPasswords no
1.30      markus     65:
1.44      stevesk    66: # Change to no to disable s/key passwords
                     67: #ChallengeResponseAuthentication yes
1.6       deraadt    68:
1.44      stevesk    69: # Kerberos options
1.51      markus     70: #KerberosAuthentication no
1.1       deraadt    71: #KerberosOrLocalPasswd yes
1.44      stevesk    72: #KerberosTicketCleanup yes
1.67      jakob      73: #KerberosGetAFSToken no
1.64      markus     74:
                     75: # GSSAPI options
                     76: #GSSAPIAuthentication no
1.66      markus     77: #GSSAPICleanupCredentials yes
1.1       deraadt    78:
1.78      pyr        79: #AllowAgentForwarding yes
1.61      djm        80: #AllowTcpForwarding yes
                     81: #GatewayPorts no
1.44      stevesk    82: #X11Forwarding no
                     83: #X11DisplayOffset 10
1.45      stevesk    84: #X11UseLocalhost yes
1.44      stevesk    85: #PrintMotd yes
                     86: #PrintLastLog yes
1.68      millert    87: #TCPKeepAlive yes
1.6       deraadt    88: #UseLogin no
1.87    ! djm        89: UsePrivilegeSeparation sandbox         # Default for new installations.
1.57      markus     90: #PermitUserEnvironment no
1.72      markus     91: #Compression delayed
1.61      djm        92: #ClientAliveInterval 0
                     93: #ClientAliveCountMax 3
                     94: #UseDNS yes
                     95: #PidFile /var/run/sshd.pid
                     96: #MaxStartups 10
1.73      reyk       97: #PermitTunnel no
1.77      djm        98: #ChrootDirectory none
1.85      djm        99: #VersionAddendum none
1.17      jakob     100:
1.44      stevesk   101: # no default banner path
1.76      djm       102: #Banner none
1.32      deraadt   103:
1.44      stevesk   104: # override default of no subsystems
1.32      deraadt   105: Subsystem      sftp    /usr/libexec/sftp-server
1.74      dtucker   106:
                    107: # Example of overriding settings on a per-user basis
                    108: #Match User anoncvs
                    109: #      X11Forwarding no
                    110: #      AllowTcpForwarding no
                    111: #      ForceCommand cvs server