Here is a list of the ports that need to be forwarded for Small Business Server:
Small Business Server - PC
- TCP: 21, 25, 80, 110, 123, 143, 220, 443, 444, 500, 987, 1701, 1723, 3389, 4125, 4500
- UDP: 123
Forwarding Ports for Small Business Server
You may need to forward ports in your router when you use Small Business Server. A port forward allows incoming connection requests from the internet to go straight to Small Business Server.
By default routers do not allow incoming network requests. A port forward can overcome this limitation.
Before Forwarding a Port
Make sure that you know these things before forwarding a port:
- Your router's IP address.
- The IP address of your computer.
- The TCP and UDP ports that need to be forwarded.
Find the IP Address of Your Router
The easiest way to locate your router's IP address is to run our free Router Detector utility. It is part of our Network Utilities suite of tools and is free for you to use it.
You can also follow our Find Your Router IP Address article.
How To Forward Ports for Small Business Server
You can use our Network Utilities software to automatically forward ports for you. Our Network Utilities software allows you to add port forwards and also remove them when you no longer need them to maximize your network security.
Another option is to go through the process of forwarding ports one step at a time. The way to forward a port is:
- You can start by logging in to your router.
- Locate the section in your router that deals with port forwarding.
- Put the IP address of your computer in the proper box in your router.
- Put the TCP and UDP ports for Small Business Server in the corresponding boxes in your router.
Usually you have to reboot your router in order to save the changes.
You can choose your router from our list to see exactly how to forward ports for Small Business Server:
List of Routers - Customized for Small Business Server
Those are the steps for forwarding ports in your router for Small Business Server.