Forwarding Ports in Your Router for Synology CS-406

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Port Forward Staff
July 22, 2021 (Last Updated: ) | Reading Time: 1 minutes

Here is a list of the ports that need to be forwarded for a Synology CS-406 device:

Synology CS-406 - 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

Setting Up a Port Forward for a Synology CS-406 device

When you use a Synology CS-406 device you may need to forward ports in your router. By forwarding ports you allow connection requests coming from the internet to be directed to a Synology CS-406 device.

Routers do not generally allow incoming connection requests from the internet. Forwarding ports can work around this limitation.

Before You Forward a Port

Before forwarding a port make sure that you know these things:

How to Locate Your Router's IP Address

We have free Router Detector software to help you find your router's IP address. The software is part of our Network Utilities suite of tools and it is completely free to use.

Otherwise, you can follow our guide Find Your Router IP Address.

How To Forward Ports for a Synology CS-406 device

The easiest way to forward your ports is to use our Network Utilities software. 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 process for forwarding a port is:

Frequently you have 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 CS-406 device:

List of Routers - Customized for Synology CS-406

That is the process required to forward ports in your router for a Synology CS-406 device.

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