Firewall user error|500D
im having big issue about firewall users. the problem is my client told me that he wants to create users and manage them using user group so i created 500 users and add them to 23 groups, after creating all the policies it work fine but now some of the users cant access the internet using their PC and not all the users cause this just few users. there is no any mac binding and any other device control policy in my firewall.funny thing is that users cant access their user name using internet but using different user name they can access the internet using same machine. so i check all the configuration but i couldn't find any error. after that i plug new network card to that PC and configure it using same IP as previews network card had then it working fine with their user name and password.
another thing is after typing username and password it authenticate in the firewall but i cant ping to the google, but using different username and password it can.
if any one can help me with this.