Virtual Private Network (VPN) Management and IPSec Tunneling Technology

Virtual private network (VPN) technology takes place for creating an encrypted connection on a lower network security. The advantage of VPN relies on ensuring the suitable security level to the connected systems. This paper concerns on security issues of virtual private network (VPN), by reviewing the Cisco Easy VPN Server for managing these networks, and reviewing IPsec tunneling technology for enhancing the security level, based on security-related problems that networks may face while connected to the Internet, and VPN's ability in providing a high productivity, security, and flexibility features. First, VPN categories, benefits, and limitations were reviewed by concerning on its technique. After that, IPsec Tunneling Technology was reviewed by illustrating its technique and characteristics. Also, the role of Cisco Easy VPN Server in VPN management was clarified due to its importance for all sizes of businesses especially the large enterprise networks with Cisco Router and Security Device Manager (SDM).