Not sure how you can check for CGNAT there must be a way? Do the usual ip address checkers that appear when Googling not help?

A static IP is chargeable though?

I guess there would be 2 ways of determining if you were on CGNAT.

Go to https://www.whatismyip.com/ and note what your public ipaddress is and then login to your router and see what it thinks your public address is. Different? you are on CGNAT.

Using the public IP address found using https://www.whatismyip.com/ traceroute to it. One hop to your public ip address means no CGNAT, 2 hops means your router passed the packet to your ISP ie CGNAT.

be-fibre ip
166.x.x.x range won't work with Sky and Disney channel
154.x.x.x range is ok
100.x.x.x range is CGNAT it will say 100.x.x.x in the router and then if you type whats my IP in Google you get a different IP normally 94.x.x.x. on the web
95.x.x.x range are ISP proxy which can be a bit iffy using amazon prime videos. it will tell you that you are using a VPN and won't always work on prime

and be-fibre is currently down again . so glad I have backup

any update ?

Update from my post.
So the static ip went live yesterday. First thing I checked was whether I could ping from outside my network. Happy to say I can.
Next was to test whether my game server was reachable. Again yes. I tried from my grandson's pc and later in the day my son tried from 2 different conections from his home. Both were able to connect.
so as far as that is concerned, I can now port forward, and I am no longer behind a cgnat. I still have one issue however. When trying to change the router from dhcp to staic ip, I am unable to enter my default gateway address. I constantly get an error stating the ip address is invalid.
I assumed this was a router issue so I contacted Linksys. After some lengthy discusions, they said the fault lies with the isp. Although I have an internal ip (192.168.1.1), which allows me to connect to the web interface, it appears to have a problem when used as a default gateway. Im now waiting on a response from Befibre on that issue. I will update when I have an answer, hopefully today.

Where exactly are you changing the DHCP setting? Is this on the client PCs (in which case the gateway would be 192.168.1.1) or is it on the router (in which case the gateway would be the ISP IP address of the first device) - but it is very likely you shouldn't change the router to static as although the ISP is giving you a static IP it will be applying it to you via DHCP - it will just give you the same address every single time).

I would doubt that a static WAN IP address would work.

If you use DHCP the remote system will know where to find the IP address as it will have provided it.

The same happens if you use PPPoE

Is it all still smooth sailing, having taken the Linksys out of the equation?

Wanting to give it a go myself but unsure if there's any fiddle required.

Static IPs weren't a 'thing' when I ordered but I can see for £4 they say it will improve the speeds. Not sure that's true

I was originally on CGNAT and I think one of the whatsmyipaddress sites actually said it was 'likely' CGNAT (although they used a different term).

Now on a 154.x.y.z address with no issues with streaming services although I do get the odd Cloudflare challenge on some sites.

I'm still seeing the odd slowdown of an evenings (10PM - 12PM). 27/212Mbs, 16/187Mbs are typical speeds, gradually getting better as the clock ticks to midnight.

The Virgin Media cabinet next to the Full Fibre cabinet on our estate looks to be completed. Haven't heard great things about VM and their coax connections, maybe the fibre will be better.

Hi Mikey,
What did you do with your landline?

I've been with BeFibre for a couple of weeks now and, after a couple of teething problems, the service is great. I've just cancelled my Vodafone broadband which took my landline with it (it finally goes in a month).

I'm looking at getting VoiP and porting my current number; have you done this?

Cheers.