append .j2 extension to templates

I saw a good point somewhere that it should help with syntax
highlighting.

1 files changed, 31 insertions, 0 deletions

diff --git a/roles/sshd/templates/sshd_config.j2 b/roles/sshd/templates/sshd_config.j2
new file mode 100644
index 0000000..abcf0d7
--- /dev/null
+++ b/roles/sshd/templates/sshd_config.j2
@@ -0,0 +1,31 @@
+{{ ansible_managed | comment }}
+
+# Parameters that have sane defaults on Debian 11 are omitted.
+
+{% set ssh_port = hostvars[inventory_hostname].ansible_port %}
+{% set ssh_user = hostvars[inventory_hostname].ansible_user %}
+
+{% set groups = [ssh_user] + ssh_allowed_groups %}
+{% set groups = groups | sort | unique %}
+
+Port {{ ssh_port }}
+
+# Whitelist users:
+PermitRootLogin no
+AllowGroups {{ groups | join(' ') }}
+
+# Only public key authentication:
+PasswordAuthentication no
+ChallengeResponseAuthentication no
+AuthenticationMethods publickey
+
+# Whitelist accepted environment variables:
+AcceptEnv LANG LC_*
+
+# Drop idle sessions:
+ClientAliveCountMax 3
+ClientAliveInterval 15
+
+# Miscellaneous:
+PrintMotd no
+Subsystem sftp /usr/lib/openssh/sftp-server