This topic describes how the Eudemon 1000E uses the VPN technology to guarantee the security of network transmission. As the VPN gateway, the Eudemon 1000E supports tunneling technologies such as L2TP and GRE. It uses the tunneling technologies with the IPSec and firewall technologies to guarantee the QoS and security of network transmission. Figure 1 shows the details. - The access VPN provides SOHO and mobile office users with security channels to access the resources of the headquarters through public switched telephone network (PSTN)/integrated services digital network (ISDN).
- The intranet VPN provides channels to access the headquarters for the regional offices and branch offices. The IPSec/IKE technology is used to ensure that data is securely transmitted over the Internet. This protects the data on the Internet from eavesdropping and tampering.
- The extranet VPN provides channels to access the internal network of an enterprise for the partners and customers. Also, it protects the security of the internal network.
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