Learn how to do an initial setup of port settings for your 1&1 Dedicated Server Windows.
For security reasons, almost all the ports in Windows Server 2003 are closed initially (or after a re-image of your Windows Server). Before you can use the server for FTP, you must open the default ports as outlined below.
If your server is running Windows Server 2008, these common ports will already be open. It is suggested to check the "IP Security Policies on Local Computer" and allow/block access as necessary for your setup.
Once logged into the server, click on Activate Default Filter Rules.
Shortcuts on your Desktop
You are asked to confirm that you are aware the following ports will be opened:
Port 80/443 (HTTP/HTTPS - Web Server)
Port 8098 (HTTPS - Web Administration Interface)
Port 20/21 (FTP Server)
Port 25 (SMTP/Mail Server)
Click Yes to open these ports.
Prompt to activate rules
The shell window will close itself and the IPSec window will appear to allow you to open up additional ports.
List of ports
Never deactivate the remote Desktop Filter. If you do, you will not be able to connect to your server.
For additional information, you may want to reference: