sshd_config: cleaning up
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# $OpenBSD: sshd_config,v 1.97 2015/08/06 14:53:21 deraadt Exp $
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# This is the sshd server system-wide configuration file. See
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# sshd_config(5) for more information.
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# This sshd was compiled with PATH=/usr/bin:/bin:/usr/sbin:/sbin
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# The strategy used for options in the default sshd_config shipped with
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# OpenSSH is to specify options with their default value where
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# possible, but leave them commented. Uncommented options override the
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# default value.
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# OpenSSH /etc/ssh/sshd_config. I am removing commented lines for this to
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# be more clear and if they are missed some day, just download
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# upstream config file or take it from any distribution.
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Port 22
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AddressFamily any
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ListenAddress 0.0.0.0
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ListenAddress ::
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@ -19,12 +12,12 @@ ListenAddress ::
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Protocol 2
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# HostKeys for protocol version 2
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HostKey /etc/ssh/ssh_host_rsa_key
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HostKey /etc/ssh/ssh_host_ed25519_key
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HostKey /etc/ssh/ssh_host_rsa_key
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## IF THE HOST KEYS ARE MISSING, RUN THE FOLLOWING AS ROOT:
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# ssh-keygen -t rsa -N "" -f /etc/ssh/ssh_host_rsa_key
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# ssh-keygen -t ed25519 -N "" -f /etc/ssh/ssh_host_ed25519_key
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# ssh-keygen -t rsa -N "" -f /etc/ssh/ssh_host_rsa_key
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# Uncomment one of the following depending on which OS
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## Arch
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@ -32,65 +25,27 @@ HostKey /etc/ssh/ssh_host_ed25519_key
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## Debian
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#Subsystem sftp /usr/lib/openssh/sftp-server
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# Lifetime and size of ephemeral version 1 server key
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#KeyRegenerationInterval 1h
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#ServerKeyBits 1024
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# Ciphers and keying
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#RekeyLimit default none
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# Logging
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# obsoletes QuietMode and FascistLogging
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#SyslogFacility AUTH
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LogLevel VERBOSE
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# Authentication:
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PermitRootLogin No
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#LoginGraceTime 2m
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PermitRootLogin prohibit-password
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#StrictModes yes
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#MaxAuthTries 6
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#MaxSessions 10
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#RSAAuthentication yes
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#PubkeyAuthentication yes
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# The default is to check both .ssh/authorized_keys and .ssh/authorized_keys2
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# but this is overridden so installations will only check .ssh/authorized_keys
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# The default is to check both .ssh/authorized_keys and
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# .ssh/authorized_keys2 but this is overridden so installations will only
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# check .ssh/authorized_keys
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AuthorizedKeysFile .ssh/authorized_keys
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#AuthorizedPrincipalsFile none
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# Password based logins are disabled - only public key based logins are
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# allowed.
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AuthenticationMethods publickey
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#AuthorizedKeysCommand none
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#AuthorizedKeysCommandUser nobody
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# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
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#RhostsRSAAuthentication no
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# similar for protocol version 2
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#HostbasedAuthentication no
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# Change to yes if you don't trust ~/.ssh/known_hosts for
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# RhostsRSAAuthentication and HostbasedAuthentication
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#IgnoreUserKnownHosts no
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# Don't read the user's ~/.rhosts and ~/.shosts files
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#IgnoreRhosts yes
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# To disable tunneled clear text passwords, change to no here!
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# Disable tunneled clear text passwords!
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PasswordAuthentication no
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#PermitEmptyPasswords no
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# Change to no to disable s/key passwords
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# Disable s/key passwords
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ChallengeResponseAuthentication no
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# Kerberos options
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#KerberosAuthentication no
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#KerberosOrLocalPasswd yes
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#KerberosTicketCleanup yes
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#KerberosGetAFSToken no
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# GSSAPI options
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#GSSAPIAuthentication no
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#GSSAPICleanupCredentials yes
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# Set this to 'yes' to enable PAM authentication, account processing,
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# and session processing. If this is enabled, PAM authentication will
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# be allowed through the ChallengeResponseAuthentication and
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@ -102,34 +57,7 @@ ChallengeResponseAuthentication no
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# and ChallengeResponseAuthentication to 'no'.
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UsePAM yes
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#AllowAgentForwarding yes
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#AllowTcpForwarding yes
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#GatewayPorts no
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#X11Forwarding no
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#X11DisplayOffset 10
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#X11UseLocalhost yes
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#PermitTTY yes
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PrintMotd no # pam does that
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#PrintLastLog yes
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#TCPKeepAlive yes
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#UseLogin no
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UsePrivilegeSeparation sandbox # Default for new installations.
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#PermitUserEnvironment no
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#Compression delayed
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#ClientAliveInterval 0
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#ClientAliveCountMax 3
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#UseDNS no
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#PidFile /run/sshd.pid
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#MaxStartups 10:30:100
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#PermitTunnel no
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#ChrootDirectory none
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#VersionAddendum none
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Banner /etc/issue.net
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# Example of overriding settings on a per-user basis
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#Match User anoncvs
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# X11Forwarding no
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# AllowTcpForwarding no
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# PermitTTY no
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# ForceCommand cvs server
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