PC Tools Firewall Plus™ 6 for Windows®

PC Tools Firewall Plus™ 7 for Windows^®

PC Tools Firewall Plus is an easy-to-use personal firewall for Windows® that helps protect your privacy by preventing unauthorized users from gaining access to your computer through a network or the Internet.

 

You may need this for :

34. Modern Warfare 2 menu and in-game freezes and lag-spikes

The 'Cooperdale' fix :

(Win 7) 

When you first start the game the firewall will ask if you want to allow it to access your network.

If you answer yes, this should create two rules in the advanced section of the firewall control panel.

One rule is for udp, the other for tcp.

1. If you block both but have upnp enabled on the router, you'll have nat strict.
2. If you enable udp, you'll have nat open.

There is no need to enable tcp, and if you do you'll get the freezes and lag spikes.

So tcp incoming needs to be blocked with your firewall, whichever it may be.

With this firewall/router configuration you get no port scanning, ergo no freezes, with an acceptable degree of security.

Full forum post with more examples and solutions can be found  here

For XP and Vista - Download PC Tool Firewall Plus
And block all the TCP ports for Sp And Mp

So what you need to do is :

1. Block INBOUND AND OUTBOUND TCP PORTS
2. Don't Block UDP Ports.