For one of the customer we allowed three URLs http://www.tenable.com* ,https://www.tenable.com*,https://plugins.nessus.org* but when user access the URL https://plugins.nessus.org its getting blocked by webgateway and the blocked url we see is http://www.nessus.org.so we allowed that URL and its working fine.
But I have two questions:-
If anyone have doubts I can explain it again.
Redirects are provided by the destination server to the client.
Only Tenable can answer your questions about how they perform redirection within the domains/sites they own.