@Memnus 

There is a brand new beta patch out for your deco XE75 pro I would try the new beta first to see if it fixes the issue.

You can read more about the beta here

If that doesn't fix the issue try the suggestions listed below.

How to Set Up Port Forwarding on Your Deco XE75 Pro:

Port Forwarding allows you to make specific devices or services on your home network accessible from the internet by forwarding external requests to designated internal devices or ports. This is commonly used for gaming, remote desktop, web servers, and other applications that require remote access.

To configure Port Forwarding on your Deco (which must be in Router mode):
1. Open the Deco app
2. Navigate to MORE > Advanced > NAT Forwarding > Port Forwarding
3. Follow the configuration instructions detailed in this FAQ: https://www.tp-link.com/support/faq/1797/

Important Notes:
• Port Forwarding is only available in Router mode, not in Access Point mode
• The Deco app will automatically create an address reservation for the selected device to ensure it always receives the same IP address via DHCP (this prevents port forwarding from failing if the device's IP changes)

If Port Forwarding Still Isn't Working:

Here are some troubleshooting steps:
1. Make sure the server/device is accessible from within your internal network first
2. Verify you are using the public WAN IP address of the Deco to access the server • if your WAN IP is not a public one, port forwarding will not work
3. Check the firewall settings on your server/device to confirm it allows traffic from the external Internet

If you've tried these steps and the issue persist please let us know. 

  @Memnus 

We shall see if we can get to the bottom of it if not I will have you send your logs in and have them reviewed by one of the senior engineers. What example from below best describes your network topology? 

@Memnus 

Taken from google - TPG in Australia uses CGNAT (Carrier-Grade NAT) for most residential NBN and home wireless broadband services to manage IPv4 scarcity. While dynamic public IPs were previously common, TPG now typically assigns private IPs, restricting port forwarding, gaming (NAT type issues), and remote access.

According to this post - https://community.tp-link.com/us/home/forum/topic/861006?replyId=1680290https://community.tp-link.com/us/home/forum/topic/861006?replyId=1680290

"That said, Carrier‑Grade NAT is widely used by ISPs and usually doesn't impact standard browsing or speed tests. However, CGNAT can affect certain use cases. These can commonly include things like port forwarding, inbound connections, some VPN configurations, online gaming NAT types, and remote access in some scenarios.That said, Carrier‑Grade NAT is widely used by ISPs and usually doesn't impact standard browsing or speed tests. However, CGNAT can affect certain use cases. These can commonly include things like port forwarding, inbound connections, some VPN configurations, online gaming NAT types, and remote access in some scenarios."

From the same post - the recommended step to resolve this behavior is to contact your ISP to ask whether a public IPv4 or IPv6 connection is available.

You are still welcome to submit your logs by using the link below. 

How to submit Deco APP log

Once they have been submitted you should get an email with a TKID number please reply to this post with your TKID number.

Thanks 

  @Memnus 

One way to tell for sure if you are behind CGNAT from your ISP is to go into the Deco app: 

1. click on "More"

2. Click "Internet Settings"

Take a screenshot with your phone or just tell us what it says for "IP Address"

Basically if its in the Internet IP is in the range between

100.64.0.0 and 100.127.255.255 then you are behind CGNAT

If thats the case then you need to do what has been advised and request them to remove CGNAT from your account. Or you may be able to purchase a static IP.

If all else fails you could get a VPN with portforwarding included from someone like purevpn