VPN (Virtual private network) is an extension of a private network that sends data between a local computer and a remote computer by sharing an Internet or public network connection to simulate point-to-point private connections.
It has good confidentiality and immunity from interference, allowing both sides to be free and secure point-to-point connection.
There are two common VPN services under Linux, on
Currently, VPN security technology is widely used. Here we mainly analyze the comprehensive application of VPN security technology on sites and clients. It is difficult to achieve network security, and the cost for achieving network security is very high. Due to the rapid development of commercial applications and business practices in the enterprise network infrastructure, every enterprise tries to underst
Requirements for VPNBecause the VPN is for the Enterprise User Service, relates to the enterprise normal operation, therefore the following from the user angle analysis to the VPN several requirements.VPN availability: That is, the established network can meet the requirements of the user's business. After the enterprise user's own business nature, the flow analysis, constructs one to adopt what technology
VPN-Virtual Private Network is designed to meet the security, reliability, and cost requirements of enterprises and specific users for information exchange, transmission, and exchange in the continuous development of Internet technologies and applications, on the basis of the public internet, the virtual private network solution is built through the channels and encryption technology.
An important core task in VPN
VPN access network technology is still developing very rapidly. At the same time, it can be seen that the market demand is growing and users are also increasing. I believe that with the technological innovation, its development prospects will be even better, it will lead the rapid development of the communication industry. In recent years, Virtual Private Network VPN established on public networks has devel
1. Why does Cisco push the second-tier tunneling protocol, rather than the third-tier tunneling protocol?
Both options are available from Cisco. Cisco did not highlight that one. The second-tier tunneling protocol is primarily used to access VPN schemes, while the third-tier tunneling protocol provides VPN support for intranets and extranets. The third-tier tunneling protocol can also be used for some
Sunflower Virtual LAN-zero-cost VPN managementMethodAssume that a company is headquartered in Shanghai and has branches in Tianjin, Hangzhou, Guangzhou, and Beijing. Guangzhou often needs to log on to the server of the Shanghai company to download files and access the OA system of the company.First, use Sunflower to build a virtual private network named "wide network:Of course, you can define and change the
Use openvpn + linux to quickly establish an enterprise VPN
Openvpn introduction http://openvpn.sourceforge.net/, not much said.
Openvpn can work in two modes:
One is the IP Route mode, which is mainly used for point-to-point
One is the Ethernet-based Tunnel Bridge mode, which is applicable to point-to-point and multi-point networks with multiple branches
The configuration example described in this article is the first
Topology:
Lan 1: redhat9.0 two NI
In linux, use poptop to quickly build the VPN service-Linux Enterprise Application-Linux server application information. The following is a detailed description. VPN (Virtual Private Network) is an extension of a Private Network. It can simulate a point-to-point Private connection through a shared Internet or public Network connection, send data between a local computer and a remote computer.
1.
About PPTP
Point-to-Point Tunneling Protocol (English: point to Point Tunneling Protocol, abbreviated to PPTP) is one way to implement a virtual private network (VPN). PPTP uses Transmission Control Protocol (TCP) to create controlling channels to send control commands and to encapsulate Point-to-Point Protocol (PPP) packets to send data using the generic Routing Encapsulation (GRE) channel. This agreement was first developed by manufacturers such as
, use the following command to download:
wget http://poptop.sourceforge.net/yum/stable/packages/pptpd-1.4.0-1.el6.x86_64.rpmRPM-IVH pptpd-1.4.0-1.el6.x86_64.rpm
3. Configure
Ppp
Configuring PPP requires editing its two profiles, one option (options) file and one user account file. First edit Option file:
Vim/etc/ppp/options.pptpd
Find Ms-dns
Modify:
Ms-dns 8.8.8.8Ms-dns 8.8.4.4
Next, modify another file that stores the user account:
Vim/etc/
Author: Arade
Along with the sixth great speed-up of China's railway, We are ushered in the advent of the power D era. The high-speed trains provide a fast way for our daily trips and greatly shorten the long journey time.
Similarly, VPN is an important "Railway" for commercial users to establish network connections ". One IPSec VPN is deployed in various regions, and users are connected in different region
Friends know how to configure VPN under win ' 2003, but many of these are based on the server in the public network IP premise, and at present many units are connected through a router outside the network, the rest of the servers are under the router, using the intranet IP, then how do we configure VPN? 51CCNP will be here to tell you a good way.
a single network adapter configures the
ADSL is called asymmetric Digital subscriber line. ADSL is called asymmetric because its two duplex channels are used to transmit data to the user, only a small portion of the bandwidth used to send back to the user's information. ADSL on a pair of copper wire support upload rate 640kbps~1mbps, 1mbps~8mbps rate, effective transmission distance within the 3km~5km range.
The application of ADSL
ADSL LAN users with 4 fixed static IP address, the application of ADSL LAN form network units can be s
Article title: Connect to France using VPN under Ubuntu. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source.
In Ubuntu, we can easily use the VPN service provided by www.linkideo.com to connect to France using UbuntuVPN.
The following describes the methods:
1. register a
This article provides a comprehensive explanation of LAN networking. During VPN networking for small and medium-sized enterprises, we will encounter many setup problems. Here we will introduce you to a configuration scheme for LAN formation, A diagram is provided to describe the Entire networking process in detail.
After setting up the Internet network on the Router, you can establish a VPN dial-up connecti
For remote Wan users, the virtual private network (VPN) should be a secure connection, but many enterprises question the security of VPN due to many obvious vulnerabilities. Rainer Enders is the CTO of NCP engineering responsible for VPN security in the Americas. In this article, we will learn how a VPN security vulner
Detailed explanation of VPN technology (on)
Lu Xiaopo
Introduction
A virtual private network enables the connection of components and resources across different networks. Virtual private networks can use the Internet or other public Internet infrastructure to create tunnels for users and provide the same security and functionality guarantees as private networks. (Figure 1)
A virtual private network allows a remote communication party, salesperson
Set up a VPN connection, presumably many friends in the day-to-day operation of the computer have been involved? In the previous Win7 64-bit flagship download, we started the VPN settings is very simple, directly in the connection to the right menu can be found, but after upgrading to the WIN8 system, such a setup method is not, Presumably a lot of users have fou
The use of VPN software to visit the major foreign websites, Foreign Service Network games Network agents, etc., when our website IP limited can be through the VPN software to replace the IP of various countries, is an essential tool for advertising marketing, but in use will inevitably encounter a variety of difficult problems. Recently, a user in the Win7 64-bit flagship version of the
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.