Install OpenVPN in CentOS6.6
VPN basic concepts
VPN
Function: establishes a secure private network on an insecure public network for encrypted data transmission.
VPN and tunneling Technology
Tunnel protocols include
Passenger Protocol: encapsulated protocol, such as PPP and SLIP
Encapsulation protocols: establish, maintain, and disconnect tunnels, such as L2TP and IPSec
Bearer Protocol: the protocol that carries encapsulated data packets, such as IP
Build OpenVPN server with CentOS6
OpenVPN is a free open-source software used to create a Virtual Private Network (VPC) encrypted channel. OpenVPN allows you to easily build a dedicated network channel similar to a LAN between different network access sites, such as home, office, and hotel accommodation.
Using OpenVPN
Use MYSQL to store OpenVPN authentication information OpenVPN
BitsCN.com
Use MYSQL to store OpenVPN verification information to install OPenVPN 1. install MYSQL [root @ localhost ~] # Tar mysql-5.1.57.tar.gz zxvf [root @ localhost ~] # Cd mysql-5.1.57 [root @ localhost mysql-5.1.57] #. /configure-prefix =/usr/local/mys
1.Case Demand Analysis
This case uses the RHEL5 and Windows XP system environment to establish a secure ssl vpn connection 8.2 for two remote LAN and remote network management workstations across insecure Internet networks ).
The gateway servers of Beijing headquarters and Shanghai Branch both use the RHEL5 system. OpenVPN must be configured separately to connect two remote LAN LAN1 and lan2. In addition, the network management workstation located on
Download and install openvpn:Use flashget or any other method to download the openvpn installation package and install it. Remember to select the easy-RSA script,The bat script used to manage the CA.Http://openvpn.se/files/install_packages/openvpn-2.0.5-gui-1.0.3-install.exeAfter installation, easy-RSA is in the c: \ Program Files \ openvpn \ directory.Start conf
One, OpenVPN server-side configuration file details
################################################## Example of a server-side configuration file for OpenVPN 2.0 for multiple clients## This file is used for multi-client ## OpenVPN also supports stand-alone ## This configuration supports Windows or LINUX/BSD systems. Also, on Windows, remember to enclose the pat
1 openvpn OverviewVPN replaces expensive leased lines to implement a virtual network on the open Internet. The virtual network itself provides security protection for data on an insecure real network.Openvpn implements a flexible VPN. openvpn has the following advantages compared with the IPsec-based VPN implemented by modifying the Protocol Stack:1. openvpn does
OpenVPN client configuration tutorial in Ubuntu generally, Linux servers that provide Web services seldom need to connect to OpenVPN, but personal Linux computers often need to connect to OpenVPN. For example, if you use Linux as the development environment, you need to connect to the company's OpenVPN. In this article
In windows, use openvpn in linux to log on to the Intranet of the remote server, and use linuxopenvpn.
Requirement: in some environments with strict network requirements, we are unable to remotely access the company's Intranet in a remote location, which brings us great inconvenience. However, we can achieve it easily through openvpn, next we will introduce it.
Note: This experiment is performed when the fi
Use openvpn in linux to log on to the Intranet of the remote server
Requirement: in some environments with strict network requirements, we are unable to remotely access the company's Intranet in a remote location, which brings us great inconvenience. However, we can achieve it easily through openvpn, next we will introduce it.
1. Network Environment:
Company openvpn
Centos6.4 quickly build an openvpn server based on user name and password authentication
Today, VPN applications are widely used. I have previously written a blog on PPTPD. The link is http://cyr5425blog.51cto.com/714067/4101788.
The home has recently changed a new broadband. You cannot use the company's PptpdVPN. the dialing status remains at the step of verifying the user name and password. Baidu and Google did not solve this problem. This seems to
At first, my vps was installed with Ubuntu10.10. In this version, I had been tossing for several days and failed to succeed. Later, after I upgraded the system online, I installed and configured openvpn. Finally, yes. If a new system version is available, a prompt will be displayed when the user just logs in. For example, enter ldquo; do-release-upgrade rdquo in shell directly; you can upgrade to the next version. I am a linux cainiao, so I will mak
You need to turn on SSH to connect your cloud server as root or user using sudo to access SSH connections. This guide assumes that users use sudo access. But you can take things using roots only by stripping "sudo" from the start of each command. If you are running Linux or Mac on your system, you can use the SSH terminal program. If you are using Windows, you can use putty to login to SSH. Once the terminal is open, assuming you are using the LINUX/MAC system, you can login to enter the followi
At first, my vps was installed with Ubuntu 10.10. In this version, I had been tossing for several days and failed to succeed. Later, after I upgraded the system online, I installed and configured openvpn. Finally, yes. If a new system version is available, a prompt will be prompted when the user just logs in, such:
That is to say, you can directly enter "do-release-upgrade" in the shell to upgrade to the next version. I am a linux cainiao, so I will m
IPSecVPN and OpenVPN-IPSec are talking about OpenVPN and other SSLVPN over the IPSec protocol, as a result, IPSec gradually fades out of sight and becomes a dedicated VPN for core networks and ultra-high-end devices. Www.2cto.com if you want to develop a VPN product, OpenVPN is like the pull personnel standing outside the bainahui Mall in different regions, attra
Generally, Linux servers that provide Web Services seldom need to connect to OpenVPN, but personal Linux computers often need to connect to OpenVPN. For example, if you use Linux as the development environment, you need to connect to the company's OpenVPN. This document uses Ubuntu as an example to describe how to connect to the remote
OpenVPN Optimization-Establishment of TLS handshake Control CHannel
An optimization of the OpenVPN data tunnel is in progress. After referring to the concept and idea of the "giant frame", I carefully considered the design and implementation of the TCP/IP protocol stack, so I come up with a possible error, but at least it is very practical in my scenario: although the upper-layer protocol sends data, it doe
Before installation, use cat/dev/net/tun to check whether tun/tap [root @ lx_web_s1 ~] is enabled. # Cat/dev/net/tuncat:/dev/net/tun: Filedescriptorinbadstate indicates that tun/tap has been enabled. you can install openVPN and configure the VPN server. 1. install and prepare yum-yinsta.
Run cat/dev/net/tun to check whether tun/tap is enabled before installation.[Root @ lx_web_s1 ~] # Cat/dev/net/tunCat:/dev/net/tun: File descriptor in bad stateIt ind
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