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ISPs

Axxess and Afrihost enable CGNAT on

On 10 February 2025, Axxess and Afrihost moved all Openserver fibre subscribers onto CGNAT.

CGNAT, short for Carrier Grade Network Address Translation, is NAT at the ISP level. So previously each customer would have an assigned IP address – if the ISP does not have enough IP addresses (IP address space) that they have bought – then they move the CGNAT.

Allowing multiple customers to access the internet through a single ip address.

The problem is usually when you have setup dynamic dns or have allowed public internet access to a device on your network – through port forwarding on the router.

This won’t work anymore.
So you will have to purchase a static ip at R39/pm.

How do you know you are on CGNAT

  1. Check the ip address you use to access the internet

    curl icanhazip.com

    or go to: https://whatismyipaddress.com/

    In my case it was: 156.155.8.86

  2. Now check the ip address on your router

    In my case it was: 100.111.7.198

If these are different then it usually means you are on CGNAT

  1. If you traceroute your public ip and there is more than one hop – you are on cgnat:

    traceroute 156.155.8.86
1  * 192.168.0.1 (192.168.0.1)  4.752 ms  10.277 ms
 2  * * *
 3  * * *
 4  * * *
 5  * * *

Sources