Connect 3 Port Forwarding not working

bbay · 2025-02-13T13:52:21+00:00

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bbay

I was follwoing the steps for the Port Forwarding process for the Connect 3 box for my Synology NAS - i need to open ports 5000 and 5001:

logging in to router
advanced settings
security
port forwarding and creating rule for those 2 ports

as this for some reason did not the trick as it does not wor, i checked if those ports are open using this tool: https://www.yougetsignal.com/tools/open-ports/ where i get the message that the ports a closed 🙁

What am i doing wrong?

Xydocq

hello bbay

You’ll have to check if you get a true public IP on the Connect Box 3.

Log on to the Connect Box 3 and have a look at Admin > Info

Then go to https://whatsmyip.com

If IPv4 address and the result shown are the same, things should be ok. You might have to restart or reset the Connect Box 3. If they are different, you’re on a CGNAT connection and port-forwarding will never work for you.

In that case you can call 0800 707 707 and request a non CGNAT connection.

In case you have a IPv6 connection you’ll have to request a IPv4 connection.

Daniele_Sunrise

bbay I can show you the way on the Syno to open the port in the Syno firewall.

Try it once and let me know if it worked.

Step 1:

Step 2:

Step 3:

Step 4:

Greetings
Daniele

bbay

Thank you Xydocq for swift response. I get the same IPv4 and will now try to reset the router - i tried restart but this did not make a difference

bbay

I tried to reset the connect 3 box, and using the above link to check for open ports, i can see that for my external IP address the 2 ports are open. However, the Synology NAS uses as internal IP and here the ports still seem to be closed. Is there any way to open those as well, or am i doing something wrong?

Thank you

Xydocq

bbay

Is the firewall on the Synology disabled?

Did you forward the ports to the LAN IP of the Synology?

Does your Synology receive a reserved IP address (also set on the Connect Box 3)?

bbay

The firewall on synology is disabled.

I do not know how to forward the ports to the LAN IP of the synology, could you share how to do this?

Also, how do i see if the Aynology NAS receives a reserved IP address? Can i see / configure this on the router?

Thanks again!

Xydocq

bbay

I’ll try my best to talk you through. Currently I don’t have a Synology attached to the Connect Box 3.

Logon to the Connect Box 3
Go to Advanced Settings > DHCP
Scroll down, you’ll find a list of attached devices
Identify the Synology NAS on the list and tick it. This will add the Mac-address of the Synology NAS to the Add reserved rule information.
If you prefer a specific IP-address you can edit the information then click Add rule. The Synology NAS should now show on the Reserved list. If you changed the IP-address you’ll have to reboot the Synology NAS
Go to Advanced settings > Security > Portforwarding
Create a new rule. Local IP= IP assigned to the Synology NAS, Local start port=5000, Local end port=5001, External start port=5000, External end port=5001, Protocol=TCP, Enabled=ON, click on Add rule and you’re done

Opening ports to the internet can be dangerous. You do that at your own risk.

bbay

Thank you again for taking the time to guide me.

I followed the above procedure but it still does not work 🙁

I am puzzled as the port forwarder tester shows me that for my external IP the 5000 & 5001 ports are open, yet, for the internal IP for my Synology NAS i cannot seem to open those ports for some reason.

Can this have something to do that there is a dsl box connected to the Connect 3?

Xydocq

bbay

Port 5000 (http) and 5001 (https) are used to logon to the GUI of the Synology NAS.

how do you enter the address in a browser to connect to the Synology NAS when you’re not on your network?

If Portforwarding doesn’t work you might want to try a different way to access a Synology NAS

bbay

Thank you Daniele, much appreciated.

It is working again and i realised that the reason for the calendar / caldav function not working was related to having activated “quickconnect” on the synology nas which apparently interferes.

But thanks again for the support!

Cheers