Windows Vista / Windows XP built in firewall
Your Windows Firewall could be blocking DreamDaemon / DreamSeeker
Go to Start -> Control Panel. Double click on the "Windows Firewall" icon, as shown below:
On Windows Vista, you will arrive at this page:
Simply click on "Change Settings" to get to the next image.
On Windows XP, you will arrive at a page like this:
Ensure that your main page looks similar to mine. If the "On" radio button is not selected (Point #1), then move on to the next section, third-party firewalls.
Next, click on the "Exceptions" tab (Point #2). You will be brought to a page like this:
Click on the "Add Port" button. This page comes up:
Next to "Name:," write in the name of the game. For the port, put in the port that you would like to use for DreamDaemon, and click OK. Click OK, and try to host again. If this does not work