added firewall strategy pattern

src/firewall/iptables.py

@@ -0,0 +1,43 @@
+from typing_extensions import override
+from firewall.fwtype import FWType
+
+class Iptables(FWType):
+
+    @override
+    def getBanlist(self,ips) -> str:
+        """
+        Generate iptables ban rules from an array of IP addresses.
+
+        Args:
+            ips: List of IP addresses to ban
+
+        Returns:
+            String containing iptables commands, one per line
+        """
+        if not ips:
+            return ""
+
+        rules = []
+        chain = "INPUT"
+        target = "DROP"
+        rules.append("#!/bin/bash")
+        rules.append("# iptables ban rules")
+        rules.append("")
+
+        for ip in ips:
+
+            ip = ip.strip()
+
+            # Build the iptables command
+            rule_parts = [
+                "iptables",
+                "-A", chain,
+                "-s", ip
+            ]
+
+            # Add target
+            rule_parts.extend(["-j", target])
+
+            rules.append(" ".join(rule_parts))
+
+        return "\n".join(rules)