Alan Orth
1c95c1faa8
Recommended by ssh-audit. Note that curve25519-sha256 is the new name for the previously private implementation in libssh.
141 lines
4.3 KiB
Django/Jinja
141 lines
4.3 KiB
Django/Jinja
# $OpenBSD: sshd_config,v 1.103 2018/04/09 20:41:22 tj 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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Include /etc/ssh/sshd_config.d/*.conf
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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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#HostKey /etc/ssh/ssh_host_rsa_key
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HostKey /etc/ssh/ssh_host_ed25519_key
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# Ciphers and keying
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#RekeyLimit default none
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# Logging
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#SyslogFacility AUTH
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# LogLevel VERBOSE logs user's key fingerprint on login. Needed to have a clear audit track of which key was using to log in.
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LogLevel VERBOSE
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# Authentication:
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#LoginGraceTime 2m
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PermitRootLogin prohibit-password
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#StrictModes yes
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MaxAuthTries 4
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#MaxSessions 10
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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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AuthorizedKeysFile .ssh/authorized_keys
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#AuthorizedPrincipalsFile none
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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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#HostbasedAuthentication no
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# Change to yes if you don't trust ~/.ssh/known_hosts for
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# 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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#PasswordAuthentication yes
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#PermitEmptyPasswords no
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# Change to yes to enable challenge-response passwords (beware issues with
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# some PAM modules and threads)
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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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#GSSAPIStrictAcceptorCheck yes
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#GSSAPIKeyExchange no
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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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# PasswordAuthentication. Depending on your PAM configuration,
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# PAM authentication via ChallengeResponseAuthentication may bypass
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# the setting of "PermitRootLogin without-password".
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# If you just want the PAM account and session checks to run without
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# PAM authentication, then enable this but set PasswordAuthentication
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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
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#PrintLastLog yes
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#TCPKeepAlive yes
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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 /var/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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# no default banner path
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#Banner none
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# Allow client to pass locale environment variables
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AcceptEnv LANG LC_*
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# override default of no subsystems
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Subsystem sftp /usr/lib/openssh/sftp-server
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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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PasswordAuthentication yes
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# Originally from: https://stribika.github.io/2015/01/04/secure-secure-shell.html
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# ... but with ciphers and MACs with < 256 bits removed, as NSA's Suite B now
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# does away with these! See: https://www.nsa.gov/ia/programs/suiteb_cryptography/index.shtml
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Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes256-ctr
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MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com
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KexAlgorithms curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256
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{% if ssh_allowed_users is defined and ssh_allowed_users %}
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# Is there a list of allowed users?
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# Is it populated? (An empty list is 'None', which evaluates as False in Python)
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# merge the items of a list into one string using a space as a separator
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# http://jinja.pocoo.org/docs/dev/templates/#join
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AllowUsers {{ ssh_allowed_users|join(" ") }} {{ provisioning_user.name }}
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{% endif %}
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