This article describes how to build a PPTP VPN service on a Xen VPS that installs the CentOS operating system. Includes the installation, configuration, and corresponding iptables rules for PPTP. This article temporarily does not involve the PPTP traffic control part, waits for the time to learn to understand the Freeradius, then writes the sequel. July 20, 2011 Update: In the security recommendations section, there is an increase in the use of differ
, improve system stability and security, and thus ensure the normal operation of the entire system.
Network ArchitectureHeadquarters of a chain company: The headquarters accesses the Internet through ADSL or leased lines, and installs a cylan device suitable for the enterprise's current development needs as the VPN network center node.Branches: branches access the Internet through ADSL or ISDN, and a cylan device suitable for enterprises' current de
First, create a VPN network
1) Build Host
Install Sunflower client on computer, login and open VPN module with Oray account (click to register)
Note: Please install the Sunflower client separately on each VPN member host and log in with the same account
Then login to the Sunflower Management
Some users want to set up a VPN for him with Windows 7, and today Xiao-bian is with you to explore how to achieve:
The following is a small series of integrated solutions, I hope to have the need to help users.
Operation Steps
1, modify the registration form Hklmsystemcurrentcontrolsetservicestcpipparametersipenabledrouter=1
2, start the service
Start Routing and Remote Access Service (required)
Stop the System Firewall service, or add
properties.
Step 11th, delete the internal item in the DHCP Relay agent.
The 12th step, then right click on "DHCP Relay Agent", and then click "New Interface."
13th step, select "Local Area Connection", click "OK", then click "OK" in the pop-up dialog box.
The 14th step, right click on "nat/Basic Firewall", then click "New Interface", then select "Local Connection", click "OK".
The 15th step, in the pop-up dialog box, click "Public interface to connect to the Internet",
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 with RPM–IVH installation, if the prompts do not, and then use RPM–UVH to install
Because, some of the packages are already in the system, with-U is the upgrade package.
2, first edit the file:/etc/pptpd.conf just add two lines at the end of the file:
IP address of the Localip +linux server
REMOTEIP + IP Address segment tha
NAT and ipsec vpn of link Balancing Devices (1) when implementing a new link Load Balancing Project, the user's previous egress devices are usually firewalls, if the organizational structure of a user is distributed, it is often necessary to build a security tunnel to communicate with the headquarters or branches over the internet through the ipsec vpn. In this case, the firewall is used as an egress device
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 network name by yourself: Click the sunflowe
When a network fault occurs, how to quickly locate the fault point is a basic indicator for evaluating the capabilities of a network administrator. Today, I will share with you how to quickly locate vpn Router faults and provide some ideas for you to solve network faults. I take the cisco vpn Router as an example here. After all, people are the leader in the vpn
When implementing a new link Load Balancing Project, users often use firewalls as their egress devices. If the user's organizational structure is distributed, it is often necessary to build a security tunnel to communicate with the headquarters or branches over the internet through ipsec vpn. In this case, the firewall is responsible for the maintenance of the ipsec vpn tunnel in addition to serving as the
Interesting ipsec vpn connection ConfigurationI. Level 1: PIX-PIXThe customer proposed to look at a vpn model. In view of the demonstration nature, the requirements were not high, nor did the customer propose the requirements for negotiation parameters and network structures, we chose cisco pix, a popular vpn device, for point-to-point communication.For hardware
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 setting up a VPN Server in a LAN, which is illustrated in detail throughout the networking process.
Next I will use Win2000 on the VPN Ser
IP addresses in the RouterOS except for the Chinese segment IP
1. Import IP address of China section
China segment IP address download: HTTP://AUTOROSVPN.GOOGLECODE.COM/FILES/ADDRESS-LIST.RSC
Open files
Drag the ADDRESS-LIST.RSC file from the computer in
Open new Terminal
Input: Import FILE=ADDRESS-LIST.RSC
Ip-firewall-address Lists
You can s
Recently completed an environment based on the ISA VPN configuration, and a number of collation, today, the detailed configuration process to the blog, I hope to be more ready for the ISA VPN configuration of the Bo friends and friends to bring some help, this article is involved in the VPN configuration certificate-based L2TP IPSEC
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
The official strongSwan client provides the Log Viewing function.
The VPN debugging method for android is as follows:
Open terminal simulator, enter su, and the super user will pop up.cd/storage/sdcard0logcat-f./log.txtThen, use Airdroid and other tools to upload the log.txt in the SD card to the computer and open the search VPN.VIII. S
, under the Security tab, there are 2 more important projects, the first is the type of VPN connection, some of the old and relatively simple VPN server configuration, usually a PPTP connection to the client connection, if you do not connect to the server, you can change the settings here.
B, another is the encryption type, often PPTP corresponds to ' do not allow encryption ' or ' optional encryption '.
open a command prompt window. You can then connect to the VPN by entering the IPCONFIG/FLUSHDNS command at the Command Prompt window.
Third, due to the exception of the Win7 system configuration, although the user has not made other configuration changes, but it is very easy because of the computer internal failure of the exception, need to modify it.
Detect the Configuration "host name or IP addr
The Apple system must use the L2TP connection mode
The key is MONSS by default and is subject to the account information received after purchase.
First, change the DNS of the local or wireless connection properties to 8.8.8.8 and 8.8.4.4, which network connection you use to access the Internet, modify the DNS of that network connection. Here is an example of a local connection.
Start configuring the VPN connection below. Click Network.
Click the A
As a new VPN technology, ssl vpn gateway has its own unique characteristics and has its own merits. Ssl vpn is suitable for mobile users' remote access (Client-Site), while IPSec VPN has inherent advantages in Site-Site VPN connections. These two products will coexist in the
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