Add role for deploying SSH config and also add mailserver-endpoint host
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@ -31,3 +31,6 @@ all:
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send-only-mailserver:
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ansible_host: send-only-mailserver.z9.ccchh.net
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ansible_user: chaos
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mailserver-endpoint:
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ansible_host: mailserver-endpoint.ccchh.net
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ansible_user: chaos
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5
playbooks/deploy_mailserver_endpoint.yaml
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playbooks/deploy_mailserver_endpoint.yaml
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---
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- name: Deploy stuff on mailserver-endpoint.ccchh.net
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hosts: mailserver-endpoint
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roles:
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- deploy_ssh_server_config
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playbooks/roles/deploy_ssh_server_config/README.md
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playbooks/roles/deploy_ssh_server_config/README.md
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# Role `deploy_ssh_server_config`
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This role deploys an SSH server config on the specified hosts.
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## `hosts`
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The `hosts` for this role need to be the machines, for which you want to deploy an SSH server config.
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## Required Variables
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This role doesn't have nay required variables.
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## Links & Resources
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- <https://infosec.mozilla.org/guidelines/openssh>
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- Also see [Debian 11 cloud 2023-04-21 default /etc/ssh/sshd_config](docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config).
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# $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_ecdsa_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 INFO
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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 6
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#MaxSessions 10
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#PubkeyAuthentication yes
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# Expect .ssh/authorized_keys2 to be disregarded by default in future.
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#AuthorizedKeysFile .ssh/authorized_keys .ssh/authorized_keys2
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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 no
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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 yes
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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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ClientAliveInterval 120
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85
playbooks/roles/deploy_ssh_server_config/files/sshd_config
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85
playbooks/roles/deploy_ssh_server_config/files/sshd_config
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# This is the sshd server system-wide configuration file deployed and managed by
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# Ansible.
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# See sshd_config(5) and the "deploy_ssh_server_config" Ansible role for more
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# information.
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# This config doesn't set all options and leaves some to the sshd defaults.
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# The sshd defaults should be alright, so this config is only really setting
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# options in cases where we want to intentionally have an option a certain way
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# for some reason or another. For example for hardening, improved loggin, etc.
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## Use the HostKey preference, Ciphers and algorithms from Mozillas Modern
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## guidelines.
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# Supported HostKey algorithms by order of preference.
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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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HostKey /etc/ssh/ssh_host_ecdsa_key
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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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## Authentication Settings.
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# Require only "publickey" for authentication.
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# From Mozillas Modern guidelines.
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AuthenticationMethods publickey
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# Enable "PubkeyAuthentication" accordingly.
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PubkeyAuthentication yes
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# Don't do the other authentication types.
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PasswordAuthentication no
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ChallengeResponseAuthentication no
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KerberosAuthentication no
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GSSAPIAuthentication no
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# Don't allow root login.
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PermitRootLogin no
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# Set this to "yes", but have "PasswordAuthentication" and
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# "ChallengeResponseAuthentication" set to "no", to have account and session
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# checks run.
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# See "docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config" for more
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# information.
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UsePAM yes
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## Miscellaneous Settings.
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# X11 forwarding shouldn't be needed.
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X11Forwarding no
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# Printing this isn't needed.
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PrintMotd no
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# Print time and date of last login, since that's nice.
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PrintLastLog yes
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# Disable general environment processing.
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PermitUserEnvironment no
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# Allow client to pass locale environment variables.
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# From "docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config".
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AcceptEnv LANG LC_*
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# Request response from client after 120 seconds of no communication.
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# Taken from "docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config".
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ClientAliveInterval 120
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## Logging
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# Set "LogLevel" to "VERBOSE" to log users key fingerprints on login.
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# This is needed for a clear audit track.
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# From Mozillas Modern guidelines.
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LogLevel VERBOSE
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# Enable the sftp subsystem and log properly.
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# From Mozillas Modern guidelines and
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# "docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config".
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Subsystem sftp /usr/lib/openssh/sftp-server -f AUTHPRIV -l INFO
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23
playbooks/roles/deploy_ssh_server_config/tasks/main.yaml
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23
playbooks/roles/deploy_ssh_server_config/tasks/main.yaml
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# Role and config created after: https://infosec.mozilla.org/guidelines/openssh
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- name: deploy SSH server config
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become: true
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block:
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- name: deploy `sshd_config`
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ansible.builtin.copy:
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force: true
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dest: /etc/ssh/sshd_config
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mode: 0644
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owner: root
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group: root
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src: sshd_config
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register: deploy_ssh_server_config__ssh_config_copy_result
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- name: deactivate short moduli
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ansible.builtin.shell:
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cmd: awk '$5 >= 3071' /etc/ssh/moduli > /etc/ssh/moduli.tmp && mv /etc/ssh/moduli.tmp /etc/ssh/moduli
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# Rebooting here instead of restarting the ssh service, since I don't know how Ansible reacts, when it restarts the service it probably needs for the connection.
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- name: reboot, if ssh server config got changed
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ansible.builtin.reboot:
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when: deploy_ssh_server_config__ssh_config_copy_result.changed
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