The ports that need to be forwarded for a Synology DS409slim NAS are listed here:
Synology DS409slim - PC
- TCP: 20-22, 25, 80, 110-111, 137-139, 143, 443, 445, 548, 873, 892, 993, 995, 2049, 3260, 4672, 5000-5001, 5005-5006, 5432, 6881-6999, 7000-7001, 9997-9999, 55536-55663, 55736-55863
- UDP: 25, 110-111, 137-139, 143, 445, 892, 993, 995, 2049, 4662, 4672, 5432, 6881-6999, 9997-9999
Forwarding Ports for a Synology DS409slim NAS
When you use a Synology DS409slim NAS you might need to forward some ports in your router. The purpose of forwarding ports is to make a direct connection from the internet to a Synology DS409slim NAS.
By default routers do not allow incoming network requests. Forwarding ports can work around this limitation.
Before You Forward a Port
You need to know the following things before you can forward a port:
- The IP address of your router.
- Your NAS's internal IP address.
- The TCP and UDP ports that need to be forwarded.
Locate Your Router's IP Address
The easiest way to locate your router's IP address is to run our free Router Detector utility. The software is part of our Network Utilities suite of tools and it is completely free to use.
You can also follow our Find Your Router IP Address article.
Setting Up a Port Forward for a Synology DS409slim NAS
You can use our Network Utilities software to automatically forward ports for you. With Network Utilities, you can easily forward ports and also un-forward ports quickly so that you can keep your network up to date with the ports that you need forwarded and maximize your network security.
Alternatively you can do it by hand. The step-by-step process for forwarding a port is:
- Start by logging in to your router.
- Locate your routers port forwarding section.
- Put the IP address of your NAS in the proper box in your router.
- Put the TCP and UDP ports for a Synology DS409slim NAS in the corresponding boxes in your router.
You probably will need to reboot your router for the changes to take effect.
You can choose your router from our list to see exactly how to forward ports for a Synology DS409slim NAS:
List of Routers - Customized for Synology DS409slim
That is the process required to forward ports in your router for a Synology DS409slim NAS.