Security

It's not recommended to modify the default domain policy but here's a quick way to disable windows firewall. You really should create a new policy for this.
Using Active Directory Users and Computers

Right click "yourdomain".local
Properties
Group policy tab
Double click on Default Domain Policy
Under Computer Configuration, click Administrative Templates
Network
Network Connections
Double click on ?Prohibit use of Internet Connection Firewall on your DNS domain network and select ENABLE

if the group policy on the client machine does not require the client to authenticate with the server, the answer is simple, ...don't. log on locally if possible.

Via Policy...

If your network is setup properly, you should not be able to remove the permissions of your local machine that your network has set forth...

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