How to Configure MacAfee Firewall

When playing a Premium Module for the first time McAfee Personal Firewall Plus will interrupt the authentication process to request that you either grant or deny access to the Internet for nwnmain.exe.
To authenticate the module successfully you will need to Grant Access. This will set the Internet application rule for this program and after this initial configuration you won't be prompted again for this program unless it is modified by an update to the game.

From the main McAfee Personal Firewall Plus Summary tab, click the Internet Applications tab to begin configuring your Internet application access rules.

In the event the Neverwinter Nights has been inadvertently blocked from the Internet it is a simple matter to change its permissions.
Programs the firewall is preventing from accessing the Internet will have the word "BLOCKED" listed under their Permissions column.
Select "Neverwinter Nights", which should have an entry under the File Name column of "nwmain.exe."
To change its permission simply select "Allow Full Access" under the Change Permission To... menu.

Once the program has been properly configured its Permissions column entry will change to "Allow Full Access."
Repeat the above process for the application name "NWN Update Program."

When the permission configuration has been completed both required programs should have their Permissions listed as "Allow Full Access."

This screen shows us what Internet capable applications installed on your computer are allowed through your firewall.
Neverwinter Nights needs Internet access to authenticate premium Neverwinter Nights modules purchased from the BioWare Store and to download game updates via the "NWN Update Program" ("nwupdate.exe").
If the required Neverwinter Nights executables ("nwupdate.exe" and "nwmain.exe") are not listed under the Internet Applications column they will need to be added. Click on the New Allowed Application button to begin.

Navigate to your Neverwinter Nights installation directory and locate "nwmain.exe."
Click on it and then click the Open button.
"nwmain.exe" has now been added to the list of allowed Internet applications, and you will be returned to the main Internet Applications menu.
Repeat the above process for "nwupdate.exe."

When the two required executables have been correctly added, their Permissions should be displayed under the Internet Applications tab as "Allow Full Access."