mirror of
https://github.com/YunoHost/yunohost.git
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1b62ce0240
* [fix] Avoid ynh user to be able to use X11 forwarding * [fix] Avoid some bad situations * [fix] Remove chroot restrictions and x11 authorization * Update comments Co-authored-by: Alexandre Aubin <alex.aubin@mailoo.org>
89 lines
3.1 KiB
Text
89 lines
3.1 KiB
Text
# This configuration has been automatically generated
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# by YunoHost
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Protocol 2
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Port 22
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{% if ipv6_enabled == "true" %}ListenAddress ::{% endif %}
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ListenAddress 0.0.0.0
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{% for key in ssh_keys.split() %}
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HostKey {{ key }}{% endfor %}
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# ##############################################
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# Stuff recommended by Mozilla "modern" compat'
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# https://infosec.mozilla.org/guidelines/openssh
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# ##############################################
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{% if compatibility == "intermediate" %}
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KexAlgorithms diffie-hellman-group-exchange-sha256
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Ciphers aes256-ctr,aes192-ctr,aes128-ctr
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MACs hmac-sha2-512,hmac-sha2-256
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{% else %}
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# By default use "modern" Mozilla configuration
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# Keys, ciphers and MACS
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KexAlgorithms curve25519-sha256@libssh.org,ecdh-sha2-nistp521,ecdh-sha2-nistp384,ecdh-sha2-nistp256,diffie-hellman-group-exchange-sha256
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Ciphers chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr
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MACs hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com
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{% endif %}
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# LogLevel VERBOSE logs user's key fingerprint on login.
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# Needed to have a clear audit track of which key was using to log in.
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SyslogFacility AUTH
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LogLevel VERBOSE
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# #######################
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# Authentication settings
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# #######################
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# Comment from Mozilla about the motivation behind disabling root login
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#
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# Root login is not allowed for auditing reasons. This is because it's difficult to track which process belongs to which root user:
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#
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# On Linux, user sessions are tracking using a kernel-side session id, however, this session id is not recorded by OpenSSH.
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# Additionally, only tools such as systemd and auditd record the process session id.
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# On other OSes, the user session id is not necessarily recorded at all kernel-side.
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# Using regular users in combination with /bin/su or /usr/bin/sudo ensure a clear audit track.
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LoginGraceTime 120
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PermitRootLogin no
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StrictModes yes
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PubkeyAuthentication yes
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PermitEmptyPasswords no
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ChallengeResponseAuthentication no
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UsePAM yes
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# Change to no to disable tunnelled clear text passwords
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# (i.e. everybody will need to authenticate using ssh keys)
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#PasswordAuthentication yes
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# Post-login stuff
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Banner /etc/issue.net
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PrintMotd no
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PrintLastLog yes
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ClientAliveInterval 60
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AcceptEnv LANG LC_*
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# SFTP stuff
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Subsystem sftp internal-sftp
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# Forbid users from using their account SSH as a VPN (even if SSH login is disabled)
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AllowTcpForwarding no
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AllowStreamLocalForwarding no
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# Disable .ssh/rc, which could be edited (e.g. from Nextcloud or whatever) by users to execute arbitrary commands even if SSH login is disabled
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PermitUserRC no
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Match User admin,root
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AllowTcpForwarding yes
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AllowStreamLocalForwarding yes
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PermitUserRC yes
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# root login is allowed on local networks
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# It's meant to be a backup solution in case LDAP is down and
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# user admin can't be used...
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# If the server is a VPS, it's expected that the owner of the
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# server has access to a web console through which to log in.
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Match Address 192.168.0.0/16,10.0.0.0/8,172.16.0.0/12,169.254.0.0/16,fe80::/10,fd00::/8
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PermitRootLogin yes
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