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Forum Discussion
Orbi LBR20 cannot connect to VPN when using LTE connection as primary
Hi, I recently purchased Orbi LBR20 and also T-Mobile Hotspot plan. So far internet access is working flawlessly. However that is not the case with the remote access. The setup I did: 1. Ena...
I was trying to do this as well.
Unfortunately, VPN, port forwarding, and ICMP replies are probably not possible using T-Mobile LTE mode.
I think that the "external IP address" that we see when we use a whatsmyip service is a T-Mobile WAN (Internet) port that hundreds/thousands of phones/devices are sitting behind. They do this because they can't give each person's phone/device a public IP address.
So in simple terms, your sim card is sitting inside of a T-Mobile LAN, and the external IP address that you see is the WAN port of this T-Mobile network. Your sim card has an internal address within this larger T-Mobile LAN and is thus non-routable from the external WAN IP address.
Public Internet --> External T-Mobile WAN IP --> your sim card with internal LAN address --> Orbi router.
When you connect your Orbi router to your Comcast modem and put the Comcast modem in "Bridged mode," Comcast is assigning a public IP address directly to your Orbi WAN (Internet) port, so it's routable, and you can forward ports, enable VPN, etc.
It would be great if there was a wireless provider that could assign a public IP address to your sim card. If anyone knows of a provider that offers this, I would love to know.