The network security concepts are targeting to prevent or reduce the risk of different types of network threats, especially during the transfer of secured data among the network nodes. Many security mechanisms are needed to achieve the network security goals. One of the important concepts for securing the transmitted data among open networks is Virtual Private Network (VPN). Some organizations don't trust on VPN security because it depends on commercial security products based on public encryption algorithms. For this reason, the objective is to make the VPN more trusted. The presented model aimed to add another layer of security to VPN security which satisfies the privacy, confidentiality, integrity and access control needs by implementing kernel-mode network driver. The implemented driver can be used to intercept the data buffers of the transferred network packets and encrypts its payload by using proprietary encryption algorithms.