Unable to connect to internet outside of LAN using a pc on the domain

NOTE: We use static IP addresses on both our LAN and DMZ

Computer A is joined to our domain and is connected to our LAN, - internet works correctly.
Computer A is joined to our domain and is connected to our DMZ (IP address changed accordingly) - internet does not work
Computer A is joined to our domain and is connected to a 3G air card (IP address set to automatic) - internet does not work.

Computer B is a member of a workgroup and is connected to our LAN - internet works correctly.
Computer B is a member of a workgroup and is connected to our DMZ - internet works correctly.
Computer B is a member of a workgroup and is connected to a 3G air card - internet works correctly.

It would seem to me that there is something in the domain is preventing an alternate connection to the internet. Could this be a GPO, or route setting?
LVL 1
tgarrityAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Hypercat (Deb)Commented:
I would look at GPO first. Look at the Windows Firewall and/or Windows Firewall with Advanced Security settings in any GPO that applies to this computer and/or user.
0
jbincsCommented:
flush the dns cache. check the IP, firewall security settings, and proxy settings (using?)
0
tgarrityAuthor Commented:
Windows firewall is disabled via GPO. We are not using a proxy.
0
Determine the Perfect Price for Your IT Services

Do you wonder if your IT business is truly profitable or if you should raise your prices? Learn how to calculate your overhead burden with our free interactive tool and use it to determine the right price for your IT services. Download your free eBook now!

Hypercat (Deb)Commented:
This may seem like a silly question, but when you changed the IP address for Computer A to move it to the DMZ, did you change the default gateway as well? How about DNS? Can you ping/connect to other computers in the DMZ as opposed to hosts on the Internet, or is there no connectivity at all when in the DMZ?

0
tgarrityAuthor Commented:
yes IP address, gateway, and DNS are changed when connecting to DMZ.
0
brwwigginsIT ManagerCommented:
If the computer is in a DMZ are you sure the computer can connect back to a DC to apply the GPO?

If you tracert to some known internet host (such as 8.8.8.8) when in the DMZ what are the results?
0
tgarrityAuthor Commented:
If I were to log on to our DMZ on a laptop that is a member of the domain as a local administrator, the internet does not connect. I think it has to do with a persistent route that was setup in the registry. I'm just not sure how it got there.
0
brwwigginsIT ManagerCommented:
do a route print from the command line and look for persistent routes. You can remove them from the command line as well with the route delete command
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
tgarrityAuthor Commented:
Thank you
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
TCP/IP

From novice to tech pro — start learning today.