I am using endpoint protection manager to block all and allow only certain website by this link: https://support.symantec.com/en_US/article.TECH95248.html
But the allow website will takes more than 5min to load and cannot load properly. When disable endpoint protection the website load as usual.
Any configuration i have miss out?
Seems to be a duplicate post:
https://www.symantec.com/connect/forums/slow-loading-website
What does your traffic log show?