Fix nftables parser to use input_wan chain

Change nftables port parser to specifically look for 'chain input_wan'
instead of any chain with 'input' in the name. This ensures we only
collect WAN/external ports, not LAN or other internal chains.

- Look for 'chain input_wan' specifically
- Remove internal network filters (no longer needed)
- Update version to v0.1.249

agent/src/collectors/systemd.rs

@@ -933,26 +933,26 @@ impl SystemdCollector {
 
         // Parse nftables output for WAN incoming accept rules with dport
         // Looking for patterns like: tcp dport 22 accept or tcp dport { 22, 80, 443 } accept
-        // Only include rules in input chain without private network source restrictions
-        let mut in_input_chain = false;
+        // Only include rules in input_wan chain
+        let mut in_wan_chain = false;
 
         for line in output_str.lines() {
             let line = line.trim();
 
-            // Track if we're in the input chain
-            if line.contains("chain input") || line.contains("chain INPUT") {
-                in_input_chain = true;
+            // Track if we're in the input_wan chain
+            if line.contains("chain input_wan") {
+                in_wan_chain = true;
                 continue;
             }
 
             // Reset when entering other chains
-            if line.starts_with("chain ") && !line.contains("input") && !line.contains("INPUT") {
-                in_input_chain = false;
+            if line.starts_with("chain ") && !line.contains("input_wan") {
+                in_wan_chain = false;
                 continue;
             }
 
-            // Only process rules in input chain
-            if !in_input_chain {
+            // Only process rules in input_wan chain
+            if !in_wan_chain {
                 continue;
             }
 
@@ -961,14 +961,6 @@ impl SystemdCollector {
                 continue;
             }
 
-            // Skip internal network traffic (LAN/private networks)
-            if line.contains("ip saddr 192.168.") ||
-               line.contains("ip saddr 10.") ||
-               line.contains("ip saddr 172.16.") ||
-               line.contains("iifname \"lo\"") {
-                continue;
-            }
-
             // Parse TCP ports
             if line.contains("tcp dport") {
                 for port in self.extract_ports_from_nft_rule(line) {