Update deploy_ssh_server_config role for Debian 12 support

playbooks/roles/deploy_ssh_server_config/README.md

@@ -14,3 +14,4 @@ This role doesn't have nay required variables.
 
 - <https://infosec.mozilla.org/guidelines/openssh>
 - 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).
+- Also see [Debian 12 cloud 2023-07-25 default /etc/ssh/sshd_config](docs/Debian_12_cloud_2023-07-25_default_etc_ssh_sshd_config).

playbooks/roles/deploy_ssh_server_config/docs/Debian_12_cloud_2023-07-25_default_etc_ssh_sshd_config

@@ -0,0 +1,123 @@
+
+# This is the sshd server system-wide configuration file.  See
+# sshd_config(5) for more information.
+
+# This sshd was compiled with PATH=/usr/local/bin:/usr/bin:/bin:/usr/games
+
+# The strategy used for options in the default sshd_config shipped with
+# OpenSSH is to specify options with their default value where
+# possible, but leave them commented.  Uncommented options override the
+# default value.
+
+Include /etc/ssh/sshd_config.d/*.conf
+
+#Port 22
+#AddressFamily any
+#ListenAddress 0.0.0.0
+#ListenAddress ::
+
+#HostKey /etc/ssh/ssh_host_rsa_key
+#HostKey /etc/ssh/ssh_host_ecdsa_key
+#HostKey /etc/ssh/ssh_host_ed25519_key
+
+# Ciphers and keying
+#RekeyLimit default none
+
+# Logging
+#SyslogFacility AUTH
+#LogLevel INFO
+
+# Authentication:
+
+#LoginGraceTime 2m
+#PermitRootLogin prohibit-password
+#StrictModes yes
+#MaxAuthTries 6
+#MaxSessions 10
+
+#PubkeyAuthentication yes
+
+# Expect .ssh/authorized_keys2 to be disregarded by default in future.
+#AuthorizedKeysFile	.ssh/authorized_keys .ssh/authorized_keys2
+
+#AuthorizedPrincipalsFile none
+
+#AuthorizedKeysCommand none
+#AuthorizedKeysCommandUser nobody
+
+# For this to work you will also need host keys in /etc/ssh/ssh_known_hosts
+#HostbasedAuthentication no
+# Change to yes if you don't trust ~/.ssh/known_hosts for
+# HostbasedAuthentication
+#IgnoreUserKnownHosts no
+# Don't read the user's ~/.rhosts and ~/.shosts files
+#IgnoreRhosts yes
+
+# To disable tunneled clear text passwords, change to no here!
+PasswordAuthentication no
+#PermitEmptyPasswords no
+
+# Change to yes to enable challenge-response passwords (beware issues with
+# some PAM modules and threads)
+KbdInteractiveAuthentication no
+
+# Kerberos options
+#KerberosAuthentication no
+#KerberosOrLocalPasswd yes
+#KerberosTicketCleanup yes
+#KerberosGetAFSToken no
+
+# GSSAPI options
+#GSSAPIAuthentication no
+#GSSAPICleanupCredentials yes
+#GSSAPIStrictAcceptorCheck yes
+#GSSAPIKeyExchange no
+
+# Set this to 'yes' to enable PAM authentication, account processing,
+# and session processing. If this is enabled, PAM authentication will
+# be allowed through the KbdInteractiveAuthentication and
+# PasswordAuthentication.  Depending on your PAM configuration,
+# PAM authentication via KbdInteractiveAuthentication may bypass
+# the setting of "PermitRootLogin prohibit-password".
+# If you just want the PAM account and session checks to run without
+# PAM authentication, then enable this but set PasswordAuthentication
+# and KbdInteractiveAuthentication to 'no'.
+UsePAM yes
+
+#AllowAgentForwarding yes
+#AllowTcpForwarding yes
+#GatewayPorts no
+X11Forwarding yes
+#X11DisplayOffset 10
+#X11UseLocalhost yes
+#PermitTTY yes
+PrintMotd no
+#PrintLastLog yes
+#TCPKeepAlive yes
+#PermitUserEnvironment no
+#Compression delayed
+#ClientAliveInterval 0
+#ClientAliveCountMax 3
+#UseDNS no
+#PidFile /run/sshd.pid
+#MaxStartups 10:30:100
+#PermitTunnel no
+#ChrootDirectory none
+#VersionAddendum none
+
+# no default banner path
+#Banner none
+
+# Allow client to pass locale environment variables
+AcceptEnv LANG LC_*
+
+# override default of no subsystems
+Subsystem	sftp	/usr/lib/openssh/sftp-server
+
+# Example of overriding settings on a per-user basis
+#Match User anoncvs
+#	X11Forwarding no
+#	AllowTcpForwarding no
+#	PermitTTY no
+#	ForceCommand cvs server
+ClientAliveInterval 120

playbooks/roles/deploy_ssh_server_config/tasks/main.yaml

@@ -4,14 +4,15 @@
 
   block:
   - name: deploy `sshd_config`
-    ansible.builtin.copy:
+    ansible.builtin.template:
       force: true
       dest: /etc/ssh/sshd_config
       mode: 0644
       owner: root
       group: root
-      src: sshd_config
+      src: sshd_config.j2
     register: deploy_ssh_server_config__ssh_config_copy_result
+    when: inventory_hostname in groups['Debian_CloudInit_VMs']
 
   - name: deactivate short moduli
     ansible.builtin.shell:

playbooks/roles/deploy_ssh_server_config/templates/sshd_config.j2

@@ -34,16 +34,28 @@ AuthenticationMethods publickey
 PubkeyAuthentication yes
 # Don't do the other authentication types.
 PasswordAuthentication no
+{# If on Debian 12, use the new keyword (KbdInteractiveAuthentication instead of ChallengeResponseAuthentication). #}
+{% if ansible_facts["distribution"] == "Debian" and ansible_facts["distribution_major_version"] == "12" %}
+KbdInteractiveAuthentication no
+{% else %}
 ChallengeResponseAuthentication no
+{% endif %}
 KerberosAuthentication no
 GSSAPIAuthentication no
 
 # Don't allow root login.
 PermitRootLogin no
 
+{# If on Debian 12, use the new keyword (KbdInteractiveAuthentication instead of ChallengeResponseAuthentication). #}
+{% if ansible_facts["distribution"] == "Debian" and ansible_facts["distribution_major_version"] == "12" %}
+# Set this to "yes", but have "PasswordAuthentication" and
+# "KbdInteractiveAuthentication" set to "no", to have account and session checks
+# run.
+{% else %}
 # Set this to "yes", but have "PasswordAuthentication" and
 # "ChallengeResponseAuthentication" set to "no", to have account and session
 # checks run.
+{% endif %}
 # See "docs/Debian_11_cloud_2023-04-21_default_etc_ssh_sshd_config" for more
 # information.
 UsePAM yes