URL for subscription verification through proxy server

I am having trouble validating my subscription status through a proxy server.

 

I have whitelisted URLs of the format *.norton.com, but still have the error.

 

How should I enhance my URL whitelist to allow subscription verification to occur?

 

Thanks in advance for your time and consideration,

Please try to configure Network Proxy settings in Norton 360 as suggested here:

https://support.norton.com/sp/en/us/norton-360-premier-edition/6.4.1.14/solutions/v15707976_N360_N360RET_6_en_us

 

Then try activate your Norton product again.

 

Thanks,

HarryP

This is good and valid information, but it does not address the question.

 

I am looking for a further level of granularity in my Proxy Server protection.

 

Thanks in advance for any help you might provide.