fix: remove dns option from wireguard config (not a valid nixos option)

hosts/lazyworkhorse/configuration.nix

@@ -66,7 +66,6 @@
           persistentKeepalive = 25;
         }
       ];
-      dns = [ "1.1.1.1" "8.8.8.8" ];
     };
   };
 
@@ -377,9 +376,12 @@
     
     # Rate limiting and attack prevention
     extraCommands = ''
-      # Rate limit SSH connections (max 4 new connections per 60 seconds)
+      # 1. Wipe the INPUT chain clean at the start of every activation
+      iptables -F INPUT
+      
+      # Rate limit SSH connections (max 20 new connections per 60 seconds)
       iptables -A INPUT -p tcp --dport 2424 -m state --state NEW -m recent --set
-      iptables -A INPUT -p tcp --dport 2424 -m state --state NEW -m recent --update --seconds 60 --hitcount 4 -j DROP
+      iptables -A INPUT -p tcp --dport 2424 -m state --state NEW -m recent --update --seconds 60 --hitcount 20 -j DROP
       
       # Rate limit HTTP/HTTPS (protects Traefik)
       iptables -A INPUT -p tcp --dport 80 -m state --state NEW -m limit --limit 25/minute --limit-burst 100 -j ACCEPT
@@ -390,6 +392,10 @@
       
       # Log dropped packets (rate limited)
       iptables -A INPUT -m limit --limit 5/min -j LOG --log-prefix "IPTables-Dropped: " --log-level 4
+
+      # 3. CRITICAL: Re-link the NixOS default firewall chain
+      # Without this line, the 'allowedTCPPorts' in your Nix config will be ignored!
+      iptables -A INPUT -j nixos-fw
     '';
   };
 
@@ -468,7 +474,7 @@
   services.openssh.settings = {
     PermitRootLogin = "no";
     MaxAuthTries = 3;
-    MaxSessions = 5;
+    MaxSessions = 10;
     LoginGraceTime = 30;
     ClientAliveInterval = 300;
     ClientAliveCountMax = 2;

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@@ -1,34 +1,36 @@
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