added iptables and nftables integration

plugins/nftables/krawl-nftables.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Fetch malicious IPs to temporary file
+curl -s https://your-krawl-instance/your-dashboard-path/api/get_banlist?fwtype=iptables > /tmp/ips_to_ban.txt
+
+# Create the set if it doesn't exist
+sudo nft add set inet filter krawl_ban { type ipv4_addr \; } 2>/dev/null || true
+
+# Add IPs to the set
+while read -r ip; do
+  [[ -z "$ip" ]] && continue
+  sudo nft add element inet filter krawl_ban { "$ip" }
+done < /tmp/ips_to_ban.txt
+
+# Create the rule if it doesn't exist
+sudo nft add rule inet filter input ip saddr @krawl_ban counter drop 2>/dev/null || true
+
+# Cleanup
+rm -f /tmp/ips_to_ban.txt