This involves two steps: first, update your existing Group Policy Objects (GPOs) with the new Windows Firewall policy settings found in the updated System.adm template included in XP SP2. This adds a new Windows Firewall folder under Network Connections in the Administrative Templates portion of Computer Configuration:
Once you’ve updated your GPOs, you can then configure Windows Firewall by making changes to the policy settings under Domain Profile (for XP SP2 machines joined to a domain) and Standard Profile (for machines in a workgroup).
Scenario 1
To disable Windows Firewall on XP SP2 machines in a domain environment, set the following policy to Disabled:
Computer Configuration\Administrative Templates\Network\Network Connections\Windows Firewall\Domain Profile\Windows Firewall: Protect all network connections
Scenario 2
To allow incoming traffic on TCP port 80 for an XP SP2 machine running as an intranet web server in a workgroup environment, configure the following policy:
Computer Configuration\Administrative Templates\Network\Network Connections\Windows Firewall\Standard Profile\Windows Firewall: Define port exceptions
To configure this policy, add the following string to the Show Contents dialog box for the policy:
80:TCP:localsubnet:enabled:Web Server (TCP 80)
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