Many modern modems are also a router, but if you have a separate router, make sure you unplug that as well to ensure the DNS settings are reset. Wait for about 30 seconds until you plug in your router and modem.
Click the plus icon (+) again and enter 8. 8. 4. 4. Click OK to proceed.
You’ll see the information you need to allow Safari to connect to this site on this tab.
For example, if Facebook is blocked by Safari, you’ll see in the “Details” page of the website “Issued by: DigiCert SHA2 High Assurance CA,” which you should find in your Keychain as well.
If you don’t have an antivirus application, you can skip this method.