EE blocking server pings/data for Ubiquiti Box - works fine on 3 & Vodafone

[getkane]

I have a Huawei 4G Router with an Ethernet cable into a Ubiquiti CCTV box.

Previously the4G Router had a 3 sim in it and everything worked fine (just a bit slow). I swapped the sim card for an EE one and my Ubiquiti CCTV box now fails to connect to the internet. The hardware and software setup is identical, only the sim/network changed.

I did some research and thought maybe it was the server the Ubiquiti box was trying to ping, changed it to 1.1.1.1 (pretty basic cloudflare server to ping) and still does not work.

The internet itself from the Huawei router on laptops/phones works fine on EE and is actually quite fast but the Ubiquiti box just doesn't connect. 

I would have thought this was a Ubiquiti issue but I swapped the EE sim to Vodafone, works fine. So identical setup works great on 3 and Vodafone, but on EE it fails. This leads me to believe it's an EE/network issue more than any of the hardware/firewall/port forwarding etc.

I also used my laptop on the EE router/wifi to ping the 1.1.1.1 server and I get a "Destination Net Unreachable" error. On any other connection I can ping 1.1.1.1 without issue and get ping reports no problem.

So what is going on with the EE network? does it block some IP's? Does it block certain traffic types/pings? Why does it work ok on 3 and Vodafone but not EE.

I have done a ton of googling and can't find any answers. I really want to use the EE network as it's much faster but obviously I can't if it's blocking devices/traffic.

[getkane]

Oh also, I almost forgot. If I run a speed test on the EE wifi at https://www.speedtest.net/

it takes a crazy long time to "find an optimal server".

Once it finds a serve the speed test runs great, like 30-40Mbps.

It just seems very very odd, when I compare to running the same test on the same device on Virgin Media fixed broadband, 3 mobile broadband and Vodafone mobile broadband.

The time it takes the service to fine a server to test with on EE is like 3 minutes or something crazy. It does in the end but why the long delay? It feels linked to this issue of pinging servers on the network somehow.

[Christopher_G]

Hi @getkane 

Welcome to the community.

As a network, we use CGNAT which means there isn't a unique IP address. It may be worth speaking to the manufacturer of your CCTV to see if this may be what's causing the issue.

Chris