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What is a VPN tunnel?

This article attempts to describe what a VPN tunnel is in simple language and explains how VPN provides strong anonymous and privacy protection. The operation performed by the VPN tunnel is called Data encapsulation. To understand what encapsulation is, let's make a simple analogy. If you are a political refugee living in another country, the secret of your place

Build a VPN on CentOS

Build a VPN on CentOS Linux: CentOS 1. Check the server for necessary support. If the check results do not support these features, pptp cannot be installed. Command:Modprobe ppp-compress-18 echo OKAfter this execution, "OK" indicates that the execution is successful. However, another check is required. Enter the following command:Cat/dev/net/tunIf the following information is displayed, ticket can be activated for vps vendors if not supported. Most v

Linux VPN (PPTPD) + Windows AD unified authentication

Topology: Note: The company's Intranet environment requires domain support; The front-end two VPN servers are Linux operating systems; A green line indicates the physical link of the network environment; Red indicates the authentication method; # When a user requests a VPN connection, use the domain account to log on. DNSPOD determines whether it is a China Telecom or a China Unicom (China Netcom) Resource

Peanut shells and Windows 2003 single card using peanut shell to achieve VPN graphics and text tutorial 1th/3 Page _ Server

First, the question of the proposedAs shown in Figure 1, In the unit has a private address for the 192.168.0.0 network, the computer is through ADSL sharing access to the Internet, a computer in the home also through ADSL access to the Internet, now want to safely at home at any time to visit the unit 192.168.0.2 this machine, many ways to achieve, the most secure is through Vpn.Second, what is a VPNIn this case, it is now the unit 192.168.0.2 the VPN

Win2008 R2 server Configuration VPN Server tutorial (detailed text) _win server

System environment: Windowsserver2008r2enterprise (fully installed)1, Configuration preparation work1.1, click on the "Start" to the right "Server Manager"1.2, click "Role" in "Server Manager"1.3, in the "role" click on the right to select the translation "Add Role", click "Next"1.4, in the "role" select "Network Policy and Access Services", click "Next"1.5, click "Next"1.6. Select the Routing and Remote Access service1.7, click "Install"2. Configure the VPN

New ways of intrusion into the system can be accessed through VPN

New ways of intrusion into the system can be accessed through VPN VPN has become more and more widely used. Some people use it to bypass the review system, some use it to access websites prohibited by the State, and some use it as the privacy protection layer. There are usually two reasons for using VPN in our work: Access Vulnerability exploitation toolkit or

Bgp mpls/VPN Network Technology

Bgp mpls/VPN Network Technology BGP protocol has been well known for a long time. Its powerful routing policy tool capabilities and its storage and routing performance go beyond any internal gateway protocol of the image model, therefore, it exists as a "bridge" between autonomous systems. before that, there was an EGP protocol, and few people knew it, because it was not widely used, and it is not used by the US military now, but there are not many po

Analysis of Dynamic Multi-Point VPN

A Brief Analysis of Dynamic Multi-Point VPN using IPSec tunnel for secure data transmission over the Internet is the main solution for communication between Headquarters and branches of the company. Its commercial value will not be mentioned here, and it will take a long time to find a document. The IPSec network topology can be a star structure (hub-and-spoke) or a mesh structure (full mesh ). In practical applications, data traffic is mainly distrib

Pptp vpn Server in CentOS6 Architecture

Pptp vpn Server in CentOS6 Architecture For more information, see http://www.178-go.com/archives/vpn-on-centos-vps.html. There are also many articles about installation and configuration on the Internet, which are also detailed. It is not difficult to configure according to steps. Because my application scenarios are a little different from those described in these articles, the server for configuring the

Build a Linux-based VPN Network

Build a Linux-based VPN Network-Linux Enterprise Application-Linux server application information. The following is a detailed description. Building a VPN is almost one of the most advanced Linux applications. Learning this technology is enough to make you proud of the capital. The main purpose of VPN is to establish an encrypted communication mechanism, and then

VPN penetration Function

The VPN penetration function of the network router is described in detail. The router VPN penetration function does not mean creating a VPN channel, but allows a VPN channel created by other terminals to pass through it, next I will take a network-connected router as an example to introduce it in detail.1. The number o

Build a VPN Server Based on CentOS

Build a VPN Server Based on CentOS 1. VPN Server Environment Description Operating System: CentOS 6.5 VPN-Server local Nic information: [root@VPN-Server~] #ifconfig eth0Linkencap:EthernetHWaddr00:0C:29:DA:D0:E0 inetaddr:192.168.30.130Bcast:192.168.30.255Mask:255.255.255.0 inet6addr:fe80::20c:29ff:feda:d0e0 /64 Scope

Problems with building a VPN server using CentOS

A problem occurred when we used PacketiXVPN in our company to build a VPN server using CentOS. After a long time, I had not solved the problem, so I found out the problem by looking for their technical staff to completely simulate our network environment... A problem occurred when we used PacketiX VPN to build a VPN server using CentOS. After a long time, I did n

Mpls vpn router and switch purchasing guide (1)

Nowadays, with the popularization and development of the Internet, mpls vpn technology is becoming more and more popular. mpls vpn is a type of MPLS Multiprotocol Label Switching Based Multi-Protocol Label Switching) the technical ip vpn is to use MPLS technology on network routes and exchange devices to simplify the route selection method of the core router, usi

Win XP How to set up VPN

Right-click the Network Neighborhood selection properties on the desktop, and open the Internet connection window Click to create a new connection, pop-up New Connection wizard Click Next Select the network that is connected to my workplace and click Next Select Virtual Private network connection, click Next Fill in the company name (you can, of course, name yourself here), click Next Select Do not dial initial connection, click Next Enter the host name or IP address (addres

Security line Enterprise VPN Firewall shopping guide

Security for the Enterprise is an eternal topic, firewall is able to protect the network security of the first line of defense, through the protection of firewalls, can be viruses, trojans, and even malicious attacks shut out, so that the firewall is to protect the security of users indispensable a barrier. The VPN firewall, on the basis of increasing the user's security, has increased the VPN function, whi

Centos 6.4 Install PPTP and configure the Debian GNOME desktop VPN Client connection

PPTP VPN I believe a lot of friends have heard, today I would like to introduce you to CentOS 6.4 to install PPTP and configure the Debian GNOME desktop VPN Client Connection example, I hope that the following will help you. The following is based on the Linode VPS Centos 6.4 Install PPTP service, remember that the Linode VPS is Xen virtual, so please see the environment configuration clearly. Fast inst

IPSec configuration in the Enterprise network VPN

divided into the following steps in the process of establishing a VPN: First, the data encapsulation, so that can not communicate with each other LAN through the export of IP address packaging to achieve off-site Lan-lan communication. The security protocol is then used to encrypt the data and convert the plaintext into ciphertext. Next to the data authentication, using encryption algorithm to send the message characteristics of the encryption gen

Tips for Win8.1: easily set up a VPN connection

Welcome to the Windows community forum, and interact with 3 million technical staff. Win8.1 is also available for nearly a month. It brings a lot of improved interfaces and operations, but it also brings a lot of trouble to users, the commonly used VPN setting function always prompts a connection error. The following is a simple example to show you how to set up a VPN connection on the Windows8.1 platform.

Implementation of link load balancing: fixed IP address and VPN Environment

I. User Network Structure 1. the user has two fixed IP addresses in the initial status. The public network goes online, and one Telecom is moved one by one. 2. the VPN device has been connected to three public network ports, in which China Telecom is directly connected to the WAN port of the VPN device, and the mobile line is divided into two lines through a switch, connect to the WAN1 and WAN2 ports of

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