Reference Manual

HOW TO install/uninstall the WinPkFilter Device Driver and the NAT32 Certificate About the NAT32 Certificate

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The WinPkFilter driver is implemented as a Network Service that can be installed either manually, as outlined here, or from within NAT32 via the following commands:

Admin Privilege Required driver install
Admin Privilege Required driver uninstall

On most platforms, once the driver has been installed, simply restart NAT32 to configure network interfaces.

Tip To update the driver, uninstall the existing driver, reboot Windows and then install the new driver.

The driver itself is contained in a file called ndisrd.sys and various versions of this file exist, one for each specific platform and driver technology. During installation, the installer may prompt for the location of the ndisrd.sys file. If so, consult the following directory tree for the location of the needed version:


    HOOKDRV                 # Hooking driver for 32-bit Windows XP Pre-SP3 systems only.
                            # Use this command to install: driverx install

    IMDRV                   # Intermediate drivers for Windows XP, Server 2003
        WIN32               # 32-bit version
        X64                 # 64-bit version

    LWF                     # Lightweight filter drivers for Windows 7, 8, 10 and Vista
        WIN7_32             # Windows 7  32-bit version
        WIN7_64             # Windows 7  64-bit version
        WIN8_32             # Windows 8  32-bit version
        WIN8_64             # Windows 8  64-bit version
        WINV_32             # Vista      32-bit version
        WINV_64             # Vista      64-bit version
        WINX_32             # Windows 10 32-bit version
        WINX_64             # Windows 10 64-bit version

Install certificate Prudent users will also install the NAT32 Certificate in order to verify the authenticity of downloads from the NAT32.COM website. This can be done in the NAT32 Console as follows:

run nat32.cer

The SHA1 hash for the certificate is: B5044BF745E7821FCE1D4DBCE71642F62D593388

Driver Problems

Tips on how to solve device driver problems can be found here.