First off I have put a lot of effort into this post, both with instructions, testing, and finally writing. Please keep this post alive so as many people can see it to save themselves from being lagged out or (Ping Flooded out). Secondly,this hasn't been tested on a MAC, and this usually only works if you use a router while playing online. Most modems already block ICMP (Ping) or cannot be modified to block them.(Please try even if you use a modem for X-box 360 it still might work!) Thirdly, It's time to stop cheaters! The Guide Starts Here: (forgive me if I am being to technical, Message me if you are stuck I WILL answer all messages received!) Open your "Network Connections" then click on your connected line/ then go to support after it opens and you should see a bunch of numbers including your IP, which you do not need. All you need is the "default Gateway" number. [url=http://smg.photobucket.com/albums/v330/blackdrug/?action=view¤t=step1.jpg]Step One[/url] Open your browser (FireFox or Internet Explorer, etc.) and enter the "Default Gateway" number into the address bar, it should take you to a login screen (if your router has a password & username, which it should, be safe!) After logging in, you are at your Routers Settings! From there access Security/Access Restrictions/ or whatever it may be called. (Linksys calls it Access Restrictions) Then Find where you can block PING and or ICMP, block/disable both and save settings! YOU ARE NOW SAFE! Until cheaters find another way. But I highly dout they will. [url=http://smg.photobucket.com/albums/v330/blackdrug/?action=view¤t=step2.jpg]Step Two[/url] PS I have Pictures for both steps, (Retrieving "default Gateway" number and then accessing Routers setting) (Those are linked) Bungie, this last part is for you, I'm in Network Security (2nd Year College) and you might want to Sticky this post. Try it; it works. LONG LIVE LEGIT GAMING, AND LONG LIVE HALO 3!!!!! [EDIT]: Adding some Info, If you can Block all PING do it. ICMP should stop lagging out, but if you can block all 3 types of PING do it, UDP TCP are the other forms of PING. Some routers have a mode called "stealth mode" if you have this TURN IT ON!!! :) [EDIT] I've added how to retrieve your IP on Vista, a great message was sent to me from an awesome player. "[i] I am running Vista and had to use my networking know how in modifying your steps. To get to where you said in Vista, a person has to perform the following steps: Start, Control Panel, Network and Sharing, then Network Connections. The problem with Vista is that once you get there, there is no support screen to show the IP, Default Gateway, etc as there is in XP. So what I had to do is actually go into my router and find the information. I have a Linksys Router, so I know that the IP address to take me to the admin password prompt is 192.168.1.1, which should be standard for all Linksys routers. Once I was in the router access page I clicked the "status" tab on the upper right corner and that showed me the default gateway...which is bascially a moot point if we're already in the router access page. What I would suggest is figure out what the other router company standard IP address is to access the user name and password for their model to perform the amazing information you already gave. I would hate to see someone that wants to play legit games getting screwed because they are running Vista and can't figure out how to protect themselves. [/i]" [Edited on 06.05.2008 4:21 PM PDT]