I have a network of about 50 xp pro client domain computers, and 1 win 2003 sbs server acting as Active Directory, DHCP, DNS, and WSUS server.
Here is the issue. Out of the 50 client machines, I have 10 or so that randomly stop accessing the internet. At first it started with not being able to access secure sites, now its no internet at all.
The client machine was able to do nslookup to various websites, but not ping. I have also tried intalling FireFox and same issue.
THE ONLY WAY that i have been able to solve this is to:
1. take note of current ip address and delete it out of the DHCP pool on sbs server and exclude that ip from being able to be handed out.
2. On the client machine i do a release and renew IP address and EVERYTHING IS BACK TO NORMAL for about a week or so.
After a while, the client starts having the same issue all over again.
Internet explorer has the proper encrytion level (128 bit) and i have tried reseting the IE to defaults, with no luck.
Also, I have tried reregistering the system dll's by running regsvr command.
The sbs server is up to date on all of its updates, and so are the client machines.
I also attached pics of dhcp and dns settings.
I have been trying to solve this issue for a few weeks now. Please Help!