Drop more bogons

src/freedombone-utils-firewall

     iptables -A INPUT -p tcp --tcp-flags ALL ALL -j DROP
     iptables -A INPUT -p tcp --tcp-flags ALL FIN,PSH,URG -j DROP
     iptables -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags FIN,SYN FIN,SYN -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags SYN,RST SYN,RST -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags FIN,RST FIN,RST -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags FIN,ACK FIN -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ACK,URG URG -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ACK,FIN FIN -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ACK,PSH PSH -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ALL ALL -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ALL NONE -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ALL FIN,PSH,URG -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ALL SYN,FIN,PSH,URG -j DROP
+    iptables -t mangle -A PREROUTING -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP
 
     # Incoming malformed NULL packets:
     iptables -A INPUT -p tcp --tcp-flags ALL NONE -j DROP