SIM Card in 4G LTE Router

merm89 — Wed, 19 Jul 2023 16:01:06 GMT

I have an O2 business sim and using it in an TP-Link wireless router which on it's own, works fine.

The issues come when I'm trying to set up port forwarding/virtual servers (as TPLink calls it) to access a CCTV server from the public internet connected to the router via ethernet - I can't seem to get it to work - it just times out.

The CCTV server works fine internally so the device is working. I have tried the IP address as well as assigning it a dynamic DNS.

Also the public IP address shown in the TPLink interface is different to what I get when I search "find my ip" in google.

Is this a configuration issue or an O2 limitation?

Thanks.

Re: SIM Card in 4G LTE Router

madasaf1sh — Wed, 19 Jul 2023 16:30:05 GMT

@merm89

It is down to the network configuration of o2, which uses a technology known as CGNAT (carrier grade network address translation).

If you want a public IP for the camera, you will have to look at one of the Niche SIM providers such as ScanCom or AAISP

topic SIM Card in 4G LTE Router in Business Customers

SIM Card in 4G LTE Router

Re: SIM Card in 4G LTE Router