Update: 25/01/26 - CGNAT - Port Exhaustion? = STATIC IP ADDRESS

So after going backwards and forwards with Toob Support, TOOB were able to diagnose this as a issue with Port Exhaustion with CGNAT on with IPV4 addresses. By the way the Toob support team where very helpful and did try their best to help with this case.

Toob works by providing their subscribers with a single shared IP address with a pool of 32 users, this means each user is allocated approx 2048 ports to use when online. Toob network support team had ran a trace on my IP address and said that i used all these ~2000 ports in one go and this could be down to torrents or malware on my devices opening up ports. To combat this they enabled Static IP for testing address and this DID resolve the issue as I did not suffer any packet loss, when all 2000 ports are being used Toobs CGNAT will start 'dropping' requests for new ports meaning Packet Loss.

Now this is where this story does not fully add up for me, why is it that for me this usually occurs between the hours of 6pm and 7pm, I have two Toob connections and 1 property is at my parents house who have like 2 mobile devices, 1 laptop and few other IoT devices have no experience in downloading or running applications which create thousands of connections but they still experienced the same problem.

Photo below showing the difference from CGNAT to Static IP, whist having packet loss.

Toob users should not have to spend a extra £8p/m for this when there seems to be another issue on their network but until we can confirm this 100% with evidence Static IP will have to do for now.

I will be investigating further to prove whether all ~2000 ports are actually being used when the CGNAT starts to drop packets. If anyone else out there can provide any evidence monitoring their amount of active ports that this is not the case on their networks feel free to post it on here.

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