Port Forwarding on Your Router for Synology DS409slim

When you use a Synology DS409slim device 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 device.

By default routers do not allow incoming network requests. Forwarding ports can work around this limitation.

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.

Use a VPN Instead

Have you considered using a VPN instead of forwarding a port? For most users, a VPN is a much simpler and more secure choice than forwarding a port.

We use and recommend NordVPN because not only is it the fastest VPN, it includes a new feature called Meshnet that makes forwarding a port no longer necessary for most applications. With NordVPN Meshnet, you can connect to your devices from anywhere in the world, completely secure, over a highly encrypted VPN tunnel.

When shopping for a VPN, make sure that they meet the following criteria:

• Your VPN provider should have a no-logs policy. This means that they do not keep any logs of any kind.
• Make sure that your VPN provider has lots of exit nodes all around the world.
• Check that your VPN will not affect your speed.
• Verify that your VPN provider uses WireGuard as the underlying protocol.
• Many people prefer a VPN provider that is not based in the United States.

This is the list of requirements that we used when we were shopping around for a VPN provider. There are lots of free, shady VPN providers out there that we looked at and dismissed.

Based in Panama, using diskless servers, and with over 6,100 servers in 61 countries, we can safely say that NordVPN satisfies all of these requirements.

Once you've set up your NordVPN account on multiple computers and enabled Meshnet, you can seamlessly access all of your devices as if they were on the same network. You don't even have to log in to your router. It's very simple.

Every time you click on one of our affiliate links, such as NordVPN, we get a little kickback for introducing you to the service. Think of us as your VPN wingman.

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.

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 device 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 device:

List of Routers - Customized for Synology DS409slim

The ports that need to be forwarded for a Synology DS409slim device 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

That is the process required to forward ports in your router for a Synology DS409slim device.

Don't forget to sign up for NordVPN's promo deal before it's gone.