Virtual private network on sim based router

Nov 05,2019 | Pemandangan: 483

The function of virtual private network (VPN) is to set up private network on public network and carry on encrypted communication. It is widely used in enterprise network. VPN gateway achieves remote access through encryption of packets and translation of packet target address. VPN can be realized by server, hardware, software and other ways.

VPN is a remote access technology, which simply means using public network to set up private network. For example, an employee of a company is on a business trip and wants to access the server resources of the enterprise Intranet. Such access belongs to remote access.

In the traditional enterprise network configuration, the traditional method of remote access is to rent DDN (digital data network) dedicated line or frame relay, which inevitably leads to high network communication and maintenance costs. For mobile users (mobile office personnel) and remote individual users, generally through the dial-up line (Internet) into the enterprise LAN, but this will inevitably bring security risks.

Let the field staff access to the internal network resources, the use of VPN solution is to set up a VPN server in the internal network. The non-local employees connect to the Internet locally, connect to the VPN server through the Internet, and then access the Intranet through the VPN server. In order to ensure the security of the data, the communication data between the VPN server and the client is encrypted. With data encryption, can think the data is in a special secure transmission of data link, like specially set up a private network, but is actually a public link VPN are using the Internet, so called VPN virtual private network, its essence is to use encryption technology in public encapsulation out a data communications channel. With VPN technology, users can access Intranet resources as long as they can access the Internet, whether they are on a business trip or working from home. This is why VPN is so widely used in enterprises.

VPN tunnel protocol mainly has three kinds, PPTP, L2TP and IPSec, in which PPTP and L2TP protocol work in the second layer of OSI model, also known as the second layer tunnel protocol; IPSec is the third layer tunnel protocol.

Industrial VPN sim based routers are well suited for projects with particularly high data transmission security. E-Lins’ sim basedrouters can all support VPN function. Like H685 sim based router and H900 dual sim 4g router support GRE tunneling, PPTP, L2TP, IPSec, OpenVPN, etc.