Check your network connections. If you see an internet gateway icon right click it. Check the display icon when connected box in the bottom left. Then click the properties button in the bottom right. Look for the program you are using to download. If it’s not listed you can add it. Click on the program then click edit. Make sure the port that you have forwarded with your router matches that listed here. Then click ok. Now you should be able to download again. Cox recently made changes so you will have to use the internet gateway to connect to the internet. And you will have to configure it to open ports. If you don’t see the internet gateway icon in the network connections, try resetting the modem. Watch for it to appear then right click it. I hope this helps people.
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If your internet gateway icon is not appearing in your network connections do this: In “Network Connections” right click “1394 Net Adapter=>Properties=>Advanced.There you will have an option: Share internet connection. check allow other users to connect. Uncheck allow users to control or disable internet gateway. Click settings. Check http and https also udp and tcp.

You should also make sure that your router has the latest firmware update.

Who doesn’t? :) Ok, makes sense actually. Personally I use
http://www.yougetsignal.com/tools/open-ports/

Had a post on it, quite functional port checker.