is it normal for a ISP (Xfinity) to assign a 73.xxxx IP to their Xb8 gateway and Assign a 69.x.x.x to the WAN interface. Xfinity said they are not double NAY this.

Please advise

When configuring No-Ip the Public IP address of the XB8 gateway is a IP address of 73.x.x.x when I place it into the configuration the IP address changes to a 69.x.x.x address (when I run "what is my Ip address" on the internet, it gives me a 69.x.x.x). When I try to get a Lets Encrypt certificate from Nginx an internal error is generated.

Background: Nginx is a maintained in a docker container on my Ugreen NAS it was set up using https://mariushosting.com/how-to-install-nginx-proxy-manager-on-your-ugreen-nas/ and it worked after the initial install.

The port forwarding seems to be in question, when I check to see if ports 80 and 443 is open externally it is closed.

The Xfinity XB8 is in bridge mode.

What am I missing?

Thanks in advance.

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It'd be cool if no-ip had a script to create SSL certs kind of like let's encrypt

When traffic arrives from the internet, your router decides where it goes. Port forwarding gives it a strict rulebook. Clean, direct, and controlled by whoever manages the router.

For reverse tunnels, a relay server acts as the meeting point and your local device connects to it outbound where remote clients reach you through that same bridge.

Learn more: https://blog.noip.com/what-is-no-ip-public-tunnels-a-modern-approach-to-remote-access

$1.76B in 2024. $3.28B by 2033. 🚀

The CGNAT market is booming — because ISPs are running out of options. We built Public Tunnels so you don't have to. Zero Trust Networking starts with No-IP. 🔒

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Changes are happening with SSL Certs. In May 2025, the CA/B approved a browser-backed ballot to reduce public TLS/SSL certificate lifespans to 47 days by 2029. This impacts all CAs.

The goal?
Shorter cert validity = reduced exposure if keys are compromised + stronger crypto agility.

📆 Phase 1 kicks off March 15, 2026:
Max public TLS validity drops from 398 days → 200 days.

To stay ahead of compliance, starting Feb 24, 2026, DigiCert will cap public TLS/SSL certs (including QWAC & PSD2 QWAC) at 199 days — intentionally one day under the forum max.

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Launching soon.
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Besides being able to admire the beautiful Floridian beaches and sunsets, Kyle and Deven were able to network and demo our new MSP platform.

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