good vpn software

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VPN implementation principle

As we all know, due to the shortage of public IP addresses, we usually use reserved IP addresses as internal IP addresses when establishing a LAN. These reserved IP addresses cannot be routed over the Internet, therefore, normally, we cannot directly access hosts in the LAN through the Internet. To achieve this goal, we need to use VPN tunneling technology.-Generally, the VPN gateway adopts a dual-network c

VPN protocols: PPTP, L2TP, and OpenVPN

, pay attention to the network conditions between two encrypted tunnels. If there is a high latency or a large number of packet loss, select TCP as the underlying protocol, due to the absence of connection and retransmission mechanisms, UDP protocol is inefficient because it requires the upper-layer protocol to be retransmitted. OpenVPN is a pure application-layer VPN protocol based on SSL encryption. It is a type of ssl

VPN: Installation configuration of PPTP + MySQL + Freeradiux

VPN: installation and configuration of PPTP + MySQL + Freeradiux MySQL storage vpn account Freeradiux verify vpn account 1. install ppp2. install pptp configuration file as follows: unzip vimoptions.ppt pdnamepptpdrefuse-paprefuse-chaprefuse-mschaprequire-mschap-v2require-mppe-128proxyarplocknobsdcompnovjnovjccompnologfdms-dns218.85.157.99ms-dns218.85.152.99plugi

Build pptp service on ubuntu server to implement vpn Server

We know that there are many VPN types, such as the Windows Server series with their own VPN servers, and the installation and configuration are very simple. Today I will introduce the deployment in the log, is a VPN-Server in Linux based on the PPTP protocol. The Ubuntu system is a Debian-based release. The communication community is very active. Because of Debia

Set up a VPN Server in CentOS

Set up a VPN Server in CentOS Note: Server Operating System: CentOS 5.X 64-bit Server IP Address: 192.168.21.128 Purpose: To install and configure pptp on the server and provide the vpn dialing service externally Specific operations: 1. Download the installation package 1. ppp # This software package is required for pptpd Installation Http://poptop.sourceforge.n

VPN configuration operation

VPN on OpenBSD configuration note VPN (vitual Private Network) has been widely used in recent years.I will not go into details if I already have many special statements. This document only configures the OpenBSD system on a PC.The VPN is a brief description. It also states that all operations are based on your own configuration experience and are implemented

Cisco ASA Web VPN configuration

There are many VPN products on the Cisco ASA Web VPN configuration market and their technologies are different. For example, in the traditional IPSec VPN, SSL allows the company to achieve more remote users to access the VPN in different locations, this service enables more network resources to be accessed and has low

VPN Implementation Unlimited Application

VPN (Virtual private network) means to establish a private data transmission channel through the public IP network, connect the remote branch office, the mobile office personnel and so on, and reduce the cost of the enterprise remote access. VPN has both public and private network features, the public network of reliable performance, rich functions and special network flexible, efficient combination.

Set up a VPN for a single network card in Linux and use NAT to share the Internet

Article title: set up a VPN for a single Linux Nic and use NAT to share the Internet. 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. The server uses shorewall as the firewall. In fact, shorewall is only used as a configuration program of iptables. In fact, the firewall is still iptables;The first step is to establ

Linux study notes virtual private network VPN experiment PPTP

client. Linux Enterprise Edition 4 1. software installation Install the RPM package. Note: The RPM packages are installed sequentially. Last installation with kernel. The sequence of installing the RPM Package is: (1 ). Dkms-2.0.5-1.noarch.rpm (2 ). Pptpd-1.3.0-0.i386.rpm (3 ). Ppp-2.4.3-5.rhel4.i386.rpm (4 ). Kernel_ppp_mppe-0.0.5-2dkms.noarch.rpm Installation Command: First use rpm? Install ivh. if you are prompted that it cannot be installed, us

Connect to a Microsoft VPN server on Ubuntu 8.10

The company uses the VPN connection, can use the company's thing, in the home Ubuntu has not been able to connect, has not been easy to finish today. The process records. Translation of a foreigner's article, hehe. It's easy to connect Microsoft's VPN from Linux, but there are some problems with the setup of Ubuntu itself. You need to use the following methods to modify this problem. Before you start the i

Comprehensive application of VPN Security Technology in site-to-site and client

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

Extremely simple Qno SmartLink IPSec VPN settings

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 leads the communication storm

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

Linux Virtual Private network experiment for PPTP VPN

The English full name of the VPN is "virtual private network", translation comes from "The fictitious specialized network". As the name suggests, virtual private network we can understand it as a virtual out of the enterprise internal line. It can establish a proprietary communication line between two or more corporate intranets that are connected to the Internet in different places via a special encrypted communication protocol, like a dedicated line

Sunflower Virtual LAN-zero-cost VPN management

port 80, and its access mode is also B/S architecture, so we should use the virtual IP address of this machine in Shanghai: 172.15.202.57 for access, next, we can try to use 172.15.202.57 on the machine in Guangzhou to access it,As you can see, through the VPN service established by sunflower, computers in two locations can use the Intranet IP address allocated by the VPN to access the WEB service, which i

Build a VPN Server Based on redhat9 (kernelversion2.4.20-8)

Build a VPN Server Based on redhat9 (kernelversion2.4.20-8) -- Linux Enterprise Application-Linux server application information. The following is a detailed description. I used the VPN configuration based on win2000/win2003. It took me a long time to configure the Linux-based VPN Server !!!! A VPN (Virtual Private Net

Implementation of full link layer processing for openvpn and other IP layer VPN

built into a bridge. Since it is made into a bridge, you certainly do not want to configure routes on it. Then, the program needs to automatically store and identify the target MAC address of the data frame to be sent, then, the Mac is used to encapsulate the data. The following code implements this: /** This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * publishe

Install an open-source VPN Server on CentOS 7

Install an open-source VPN Server on CentOS 7 One of my biggest concerns when I access the Internet is how to ensure the security and privacy of my data. While searching for answers, I found many anonymous methods, such as using a proxy website. However, third-party services cannot be fully guaranteed. What I need is a software that allows me to install and run on my own, so that I can ensure that only I c

Development History of VPN Technology

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

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