Firewall and DHCP question

Hi,

We had Symantec Firewall earlier and there were couple of rules that were

defined (I am not sure whether it was defined in the GPO or using local

machine policy).

The rules were that if the machine was getting DHCP address then they were

blocked at the firewall for access violation of certain sites. So, the users

had to log in to Symantec and was then allowed to go out.

We have now removed Symantec firewall and we have added another product

called Fortigate. So, when the user tries to access some sites which are

restricted by the firewall. But, if the same user is provided a static

address IP range which is actually allowed to go through the firewall without

any restrictions, then they can access it.

So, I am not sure whether there is any kind of GPO (local as our previous

admins have defined this locally) or through Central GPO that there could

have been a restriction that could have been placed where it is defined that

if the machine has a DHCP address then restrict this machine and filter the

websites that it goes to?

I hope I am saying it clearly here, please if you think I am confusing

anybody here, please let me know and I will go ahead and explain further.

thanks in advance!