This is the procedure to use:
- Turn off both your router & ONT.
- While they are off, clear your internet cache from all browsers, and close all browsers.
- Go to command prompt (cmd) run ipconfig /flushdns.
- You might consider disabling or re-configuring your proxy or VPN.
Do routers have a DNS cache?
A router can have a DNS cache as well, which is why rebooting a router is often a troubleshooting step. For the same reason you might flush the DNS cache on your computer, you can reboot your router to clear the DNS entries stored in its temporary memory.
Is it safe to flush DNS cache?
Clearing the DNS server will remove any invalid addresses, whether because they're outdated or because they've been manipulated. It's also important to note flushing the cache doesn't have any negative side effects.