Update to 2021-12-13 19:00

roles/ssh/tasks/iptables.yml

@@ -0,0 +1,19 @@
+---
+
+- name: Apply rate limits
+  iptables_raw:
+    name: sshd_limit
+    rules: |
+      -A INPUT -p tcp -m state --state NEW -m multiport --dports {{ sshd_ports | join(',') }} -m recent --name ssh_limit --set
+      -A INPUT -p tcp -m state --state NEW -m multiport --dports {{ sshd_ports | join(',') }} -m recent --name ssh_limit --rcheck --seconds 60 --hitcount {{ sshd_max_conn_per_minute }} -j LOG --log-prefix "Firewall (ssh limit): "
+      -A INPUT -p tcp -m state --state NEW -m multiport --dports {{ sshd_ports | join(',') }} -m recent --name ssh_limit --rcheck --seconds 60 --hitcount {{ sshd_max_conn_per_minute }} -j REJECT
+    state: "{{ (sshd_max_conn_per_minute > 0) | ternary('present','absent') }}"
+    weight: 10
+  tags: ssh,firewall
+
+- name: Handle ssh ports
+  iptables_raw:
+    name: sshd_ports
+    state: "{{ (sshd_src_ip is defined and sshd_src_ip | length > 0) | ternary('present','absent') }}"
+    rules: "-A INPUT -m state --state new -p tcp -m multiport --dports {{ sshd_ports | join(',') }} -s {{ sshd_src_ip | flatten | join(',') }} -j ACCEPT"
+  tags: ssh,firewall