When playing a Premium Module for the first time Norton Personal Firewall will interrupt the authentication process to request that you either grant or deny access to the Internet for nwnmain.exe.
Norton Personal Firewall - In-Game Automated Firewall Configuration (Step 2)
To authenticate the module successfully you will need to select the first option, which is: Always allow connections from this program on all ports. 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.
Norton Personal Firewall - Changing existing Internet application permissions (Step 1)
To access the firewall configuration settings click the Norton Internet Security button found in the left pane under the Norton Internet Protection Center menu.
In the main window click on Personal Firewall and then Configure to begin configuring your Internet application access rules.
Norton Personal Firewall - Changing existing Internet application permissions (Step 2)
To access the firewall configuration settings click the Norton Internet Security button found in the left pane under the Norton Internet Protection Center menu.
In the main window click on Personal Firewall and then Configure to begin configuring your Internet application access rules.
Norton Personal Firewall - New Allowed Application (Step 2)
This screen shows us what Internet capable applications installed on your computer are allowed through your firewall.
The individual programs are listed under Manual Program Control along with their individual Internet Access permissions.
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 Program column they will need to be added. Click on the Add... button to begin.
Norton Personal Firewall - New Allowed Application (Step 4)