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
Rd (route-distinguisher) is used to identify different VPN instances on the PE device. Its main function is to achieve address multiplexing between VPN instances. It and the IP address constitute a 12byte vpnv4 address space, rd and the route are carried together in the bgp update message and published to the peer end. On the one hand, we need to verify whether the RD function is implemented, whether the PE
transmitted over the Internet is secret to the public, while legitimate users can access the confidential data securely through VPNs.
Ways to create a VPN connection
There are two ways to create a VPN connection: a dial-up connection to an Internet service provider (ISP), or a direct connection to the Internet.
If you are dialing in to your ISP, your I
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 can access data.
What is this software called?
# vimservers // modify key # ServerNameorClient/ServerpairKey # Secret # localhosttesting123localhost vpn #/usr/local /freeradius/sbin/radiusd-X // This process produces a certificate. If you want to modify the key, you must first Delete the previous certificate file # cd/usr/local/freeradius/etc/raddb/certs # rm-rf *. pem *. der *. csr *. crt *. key *. p12serial * index.txt * 5. associate the mysql file in this directory/usr/local/freeradius/et C/ra
Firewalls are often deployed on the edge of our network environment to isolate the network and protect the security of the Intranet and Internet. For example, in the edge network, MIP a public IP address to a VPN device on the Intranet, for the sake of security, EDGE networks need to have selective open ports or Protocols. MIP is as follows: 650) this. width = 650; "border =" 0 "alt =" "src =" http://www.bkjia.com/uploads/allimg/131227/0FP912P-0.jpg "
Most enterprises need to protect internet communication. For many enterprises, the simplest way to protect communication is to use virtual private network (VPN) to create an encrypted channel between systems to communicate.
The most common use cases of VPN include connecting remote staff to the central data center, allowing them to securely access the internal resources required for their work, and creating
With the acceleration of global market integration and the further development of information technology, all walks of life and various types of enterprises are using information technology more and more to improve the management level of enterprises and to expand trans-regional business. IP VPN has been favored by the use of public network resources to establish a safe, reliable, economical, efficient, convenient and high-speed transmission of the en
process as long as there is a token ?! In this way, the operating system becomes an operating system, and there is no Kernel Concept any more. The so-called kernel is downgraded to a service provider, just like the staff in the accreditation hall. There is no privilege, but you believe that he or she can give you a license. Each service part of the correct operating system should be componentized. It shoul
VPN protocols: PPTP, L2TP, and OpenVPN1. Concepts of PPTP, L2TP, and OpenVPN Tunneling Protocols 1. Default port number of PPTP (Point to Point Tunneling Protocol): 1723 PPTP, or PPTF Protocol. This protocol is a new enhanced security protocol developed on the basis of the PPP protocol. It supports multi-protocol Virtual Private Network (VPN) and can pass the password authentication protocol (PAP) and Exten
1,
Enable the remote access component of xp, Which is disabled by default. Open services. msc, find the Routing and Remote Access Service, set the Startup Type to automatic, and start the service.
2,Right-click "Network Neighbor" and click "properties". The "incoming connection" is displayed ".
3,Double-click to open properties, and select the check box under "Virtual Private Network.
Open the user page,
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
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
, 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/ppp/chap-secrets
This file is very simple, w
) Comment out logwtmp in this file: # logwtmp (2) then configure the Local intranet IP address and the IP address to be allocated after the client dials in: localip 192.168.0.1 remoteip 192.168.0.201-250 2. enable ms-dns. The path is in/etc/ppp/options.ppt pd. This DNS can be set to a public DNS server or configured by yourself. Google Internet DNS is generally used: ms-dns 8.8.8.8 3. Configure the user name and password for VPN access and the assigne
In this paper, the system is Centos6.0, the VPN service takes PPTPD as an example, and the bottom involves pptpd+freeradius+mysql authentication.
Related url:http://lansgg.blog.51cto.com/5675165/1225461
This paper is a real case; leader demand is mostly like this, save the cost also to achieve the desired effect; no way, the total to do a result;
Demand, a domestic V
-2.4.20-8.i686
Run the following command to check whether the kernel MPPE patch is successfully installed:
# Modprobe ppp-compress-18 echo OK
If OK is displayed
You do not need to add MPPE to the kernel
2. Install and update ppp
# Rpm-Uvh ppp-2.4.3-4.rhl9.i386.rpm
3. Install pptpd
# Rpm-ivh pptp-1.6.0-1.i386
4. edit/etc/pptp. conf
You only need to enter the last two rows:
Localip 192.168.100.1 // define the IP address on the server (that is, the ip address of ppp0 after the connection)
Remo
*
Note: The login username and password for the PPTP VPN are Sjolzy and password respectively
2.3 Configuration file/etc/pptpd.conf
The code is as follows
Copy Code
Mv/etc/pptpd.conf/etc/pptpd.conf.bakVi/etc/pptpd.conf
Enter the following content:
The code is as follows
Copy Code
Option/etc/ppp/options.pptpdLogwtmpLocalip 192.168.9.1Remoteip 192.168.9.11-30
Note:
PART I
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This article is based on ubutnu to install,
Previous achievements, the establishment of freeradius and mysql (http://www.cnblogs.com/klobohyz/archive/2012/02/01/2334811.html)
Continue to combine pptp components to verify the form VPN, and start to install pptp below
apt-get install pptpd
Configure pptpd. conf
vim /etc/pptpd.conf
Add the following content to the bottom of
Detailed explanation of VPN technology (next)
Lu Xiaopo
(Immediately medium)
Data transfer phase
Once this 4-phase negotiation is complete, PPP begins forwarding data between the connecting peers. Each transmitted datagram is encapsulated within the PPP header, which is removed after it arrives at the receiving party. If you choose to use data compression in Phase 1 and you have completed the negotiation in Phase 4, the data will be compressed bet
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