1 1.1.1.9 christos # $OpenBSD: sshd_config,v 1.94 2015/02/02 01:57:44 deraadt Exp $ 2 1.1 christos 3 1.1 christos # This is the sshd server system-wide configuration file. See 4 1.1 christos # sshd_config(5) for more information. 5 1.1 christos 6 1.1 christos # The strategy used for options in the default sshd_config shipped with 7 1.1 christos # OpenSSH is to specify options with their default value where 8 1.1.1.4 christos # possible, but leave them commented. Uncommented options override the 9 1.1 christos # default value. 10 1.1 christos 11 1.1 christos #Port 22 12 1.1 christos #AddressFamily any 13 1.1 christos #ListenAddress 0.0.0.0 14 1.1 christos #ListenAddress :: 15 1.1 christos 16 1.1.1.2 adam # The default requires explicit activation of protocol 1 17 1.1.1.2 adam #Protocol 2 18 1.1 christos 19 1.1 christos # HostKey for protocol version 1 20 1.1 christos #HostKey /etc/ssh/ssh_host_key 21 1.1 christos # HostKeys for protocol version 2 22 1.1 christos #HostKey /etc/ssh/ssh_host_rsa_key 23 1.1 christos #HostKey /etc/ssh/ssh_host_dsa_key 24 1.1.1.3 christos #HostKey /etc/ssh/ssh_host_ecdsa_key 25 1.1.1.8 christos #HostKey /etc/ssh/ssh_host_ed25519_key 26 1.1 christos 27 1.1 christos # Lifetime and size of ephemeral version 1 server key 28 1.1 christos #KeyRegenerationInterval 1h 29 1.1 christos #ServerKeyBits 1024 30 1.1 christos 31 1.1.1.7 christos # Ciphers and keying 32 1.1.1.7 christos #RekeyLimit default none 33 1.1.1.7 christos 34 1.1 christos # Logging 35 1.1 christos # obsoletes QuietMode and FascistLogging 36 1.1 christos #SyslogFacility AUTH 37 1.1 christos #LogLevel INFO 38 1.1 christos 39 1.1 christos # Authentication: 40 1.1 christos 41 1.1 christos #LoginGraceTime 2m 42 1.1 christos #PermitRootLogin yes 43 1.1 christos #StrictModes yes 44 1.1 christos #MaxAuthTries 6 45 1.1 christos #MaxSessions 10 46 1.1 christos 47 1.1 christos #RSAAuthentication yes 48 1.1 christos #PubkeyAuthentication yes 49 1.1.1.4 christos 50 1.1.1.4 christos # The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2 51 1.1.1.4 christos # but this is overridden so installations will only check .ssh/authorized_keys 52 1.1.1.4 christos AuthorizedKeysFile .ssh/authorized_keys 53 1.1 christos 54 1.1.1.5 christos #AuthorizedPrincipalsFile none 55 1.1.1.5 christos 56 1.1.1.6 christos #AuthorizedKeysCommand none 57 1.1.1.6 christos #AuthorizedKeysCommandUser nobody 58 1.1.1.6 christos 59 1.1 christos # For this to work you will also need host keys in /etc/ssh/ssh_known_hosts 60 1.1 christos #RhostsRSAAuthentication no 61 1.1 christos # similar for protocol version 2 62 1.1 christos #HostbasedAuthentication no 63 1.1 christos # Change to yes if you don't trust ~/.ssh/known_hosts for 64 1.1 christos # RhostsRSAAuthentication and HostbasedAuthentication 65 1.1 christos #IgnoreUserKnownHosts no 66 1.1 christos # Don't read the user's ~/.rhosts and ~/.shosts files 67 1.1 christos #IgnoreRhosts yes 68 1.1 christos 69 1.1 christos # To disable tunneled clear text passwords, change to no here! 70 1.1 christos #PasswordAuthentication yes 71 1.1 christos #PermitEmptyPasswords no 72 1.1 christos 73 1.1 christos # Change to no to disable s/key passwords 74 1.1 christos #ChallengeResponseAuthentication yes 75 1.1 christos 76 1.1 christos #AllowAgentForwarding yes 77 1.1 christos #AllowTcpForwarding yes 78 1.1 christos #GatewayPorts no 79 1.1 christos #X11Forwarding no 80 1.1 christos #X11DisplayOffset 10 81 1.1 christos #X11UseLocalhost yes 82 1.1.1.8 christos #PermitTTY yes 83 1.1 christos #PrintMotd yes 84 1.1 christos #PrintLastLog yes 85 1.1 christos #TCPKeepAlive yes 86 1.1 christos #UseLogin no 87 1.1.1.5 christos UsePrivilegeSeparation sandbox # Default for new installations. 88 1.1 christos #PermitUserEnvironment no 89 1.1 christos #Compression delayed 90 1.1 christos #ClientAliveInterval 0 91 1.1 christos #ClientAliveCountMax 3 92 1.1.1.9 christos #UseDNS no 93 1.1 christos #PidFile /var/run/sshd.pid 94 1.1.1.6 christos #MaxStartups 10:30:100 95 1.1 christos #PermitTunnel no 96 1.1 christos #ChrootDirectory none 97 1.1.1.5 christos #VersionAddendum none 98 1.1 christos 99 1.1 christos # no default banner path 100 1.1 christos #Banner none 101 1.1 christos 102 1.1 christos # override default of no subsystems 103 1.1 christos Subsystem sftp /usr/libexec/sftp-server 104 1.1 christos 105 1.1 christos # Example of overriding settings on a per-user basis 106 1.1 christos #Match User anoncvs 107 1.1 christos # X11Forwarding no 108 1.1 christos # AllowTcpForwarding no 109 1.1.1.8 christos # PermitTTY no 110 1.1 christos # ForceCommand cvs server 111