Post describes procedure to disable IPv6 on CentOS/RHEL 7. There are 2 ways to do this : 1. Disable IPv6 in kernel module (requires reboot) 2. Disable IPv6 using sysctl settings (no reboot required)

Note that the "IPv6 Connectivity: No Internet access" problem can occur for a number reasons, depending on various circumstances. To address the issue, you might need to update network drivers, disable the IP helper service, reset IPv6 settings, release and renew your IP configuration, etc. How to Fix IPv4/IPv6 'No Internet Access' Error - Appuals.com Update your network drivers. The best way to update your network drivers is to go … No-IP Now Offers IPv6 Dynamic DNS | No-IP Blog Nov 03, 2019

Tunneling allows IPv6 packets to be transmitted over IPv4 infrastructure - and vice-versa. Translation allows IPv6-only devices to communicate with IPv4-only devices. You’ll be happy to know the slow rollout of IPv6 over a period of years will bring no immediate impact to your AT&T Internet service.

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Apr 24, 2020

The “IPv6 no internet access” problem may occur if you are using the wrong Ethernet driver or it’s out of date. So you should update your Ethernet driver to see if it fixes your problem. If you don’t have the time, patience or skills to update the driver manually, you can do it automatically with Driver Easy. IPv6 No Network Access: Everything You Need to Know and Jul 12, 2019 Why No IPv6? 101 rows