Vpn Principle and Implementation-tunnel implementation theoretically reasonable ip over ssl needs some additional technical support before it can be used, you must try to re-encapsulate an ip data packet by ssl. This action cannot be performed in the original standard protocol stack. The standard protocol stack does not support two-way data flow, one of the solutions is to modify the Protocol Stack and implement a lightweight ssl protocol layer under
VPN is an extension of a private network, that is, a temporary and secure private network connection created on a private and public network (usually the Internet. Currently, VPN is mainly used in the following three aspects: First, remote user access is achieved through the Internet, and VPN can support secure remote access to the enterprise LAN through the Inte
Only three steps are required to quickly build a vpn in Centos
My host CENTOS 6.5 64X
Step 1: Download the one-key installation package for vpn (dedicated to CentOS6)
# Wget http://www.iamhackspace.com/download/shell/vpn_cent6.sh#chmod a + x vpn_centos6.sh
Step 2: run the one-click installation package
# Bash vpn_centos6.sh
There are three options:
Install VPN
Install pptpd VPN service in CentOS 6.4
Install pptpd VPN service in CentOS 6.4
I. Environment Introduction
Pptpd is often used to penetrate the wall or manage servers in the IDC
1) CentOS 6.4 64bit minimal
Ii. Service Installation
$ Wget http://poptop.sourceforge.net/yum/stable/rhel6Server/pptp-release-current.noarch.rpm$ Rpm-ivh pptp-release-current.noarch.rpm$ Yum install pptpd ppp
Iii. Configuration
$ V
CCNP Study Notes 2-routing part-VPNReview the dynamic protocol: rip vpn ospf encapsulation UDP 520 IP 88 IP 89 update address 224.0.0.9 224.0.0.10 224.0.0.5/6 use passive to implement intercommunication between the two ends of unicast neighbor and the output interface to implement unicast NBMA point to multicast unicast key complete neighbor update methods, timing 30 seconds 15% offset, trigger incremental update, trigger timing 30 minutes trigger AD
China Unicom CDMA (WAP monthly subscription) method on the Internet.
China Unicom's "interactive vision" Traffic monthly package (that is, WAP monthly package) on the Internet method.
I. Specific methods:
1. First install the driver of the CDMA Nic.
2. Install the VPN Client software and authentication certificate.
3. Insert the UIM card into the NIC and enable the CDMA Nic.
Program .
Dialing #777
Account WAP
WAP Password
4. Enable the
Build an ipsec/xl2tpd VPN in centos 6.5
In this article, yum is installed directly, saving you trouble.
I. Installation (a command is fixed)
Yum install openswan ppp xl2tpd
Like the source code installation of friends can go to the http://pkgs.org to download the source package.
Ii. Configuration
1. edit/etc/ipsec. conf
Vim/etc/ipsec. conf
Replace xx. xxx with the actual Internet fixed IP address of your own VPS. Others do not move.
Config setup
Nat_
Run pptpd on CentOS to implement VPN ServiceBuy a cheap VPS and install the linux system. Run pptpd to implement the VPN service and use the famous iptables for nat forwarding. This looks like a professional VPN service. Then configure the user name and password, you can achieve multi-person sharing vpn simple steps ar
Why is the WIN7 system VPN not connected to the Internet? Don't worry, just look at the little book. This Win7 system VPN Setup Guide ~ may be able to help you.
First: After you set up a VPN, you cannot connect to the workspace network at home (or elsewhere) through the Internet, check the items in this list:
-Make sure that the virtual private network (
Workaround:
A problem that is easy to connect to VPN under the corporate Unit network, because the VPN connection is global and can change native IP, resulting in the inability to access the internal network of the company. To solve this problem is not difficult, with the help of the modified routing table to bypass, so that access to the internal network or through the local gateway, the following describ
1 Introduction
With the enlargement of the scale of university running, the new (sub) campus spread to the wireless network construction and management put forward higher requirements. VPN technology can not only build a unified wireless network management platform, but also improve the security of wireless campus network.
2 VPN Overview
VPN (Virtual private n
Download 25 exquisite IPHONE 6 and apple watch prototypes !, IPhone Apple
Since the launch of iPhone 6 and Apple Watch, many designers have begun to create prototype materials. Thanks to the fact that many of these works have been selflessly shared on the Internet, not only for personal use, it can also be commercialized. Today, we have collected 25 exquisite an
First, understand the iPhone on the Anti-Theft protection function
1, the iphone will have a "Find my iphone" It is used to prevent the loss of anti-theft lock machine used.
2, this function in the iphone "set-icloud", we click to enter can use their own Apple ID login ICloud Service, after the succes
Believe that everyone buys an iphone, very few people will go to study a system function, the general is to get hand to use, some more annoying function also bother to close. In fact, turning off some features will make your mobile experience feel a lot higher.
1. WiFi assistants must be closed (Setup > Cellular mobile network > Wireless LAN Assistant)
The first step in getting a cell phone should be to turn it off, because when you turn on
1, the iphone with the voice input
If you use voice input then the network is not necessarily very slow oh, so we can have a better network environment than the implementation of the situation.
1) Open Siri
2) and then we click on the microphone logo to the following figure
3 Finish the words we click to complete, as shown in the picture.
2, third party input of the whole sentence
1 We install a third party input o
Note: IPhone5S want to connect to the computer, first need to download the iphone helper class software on the computer.
1.ios7 and above system has the data line detection function, if not the original data line sometimes can not charge Oh.
2. The Shanzhai version of the data cable may have problems so we'd better use the original data cable.
3. If the data cable is not a problem, but also the original, then please check the computer's USB port
1. We Baidu search to download a 91 assistant PC side and then install on the computer.
2. We first prepare the ringtone file, download most of the MR4 format can be used to convert to CAF
3. Then connect the iphone to the computer, then click on the "File management--Quick entry--application--Micro-letter--micromessenger.app" in 91 after 91 assistants identify the phone.
4. Rename the downloaded ringtone to IN.CAF
5. Then in the pop-up co
Before starting work, first in the PC to download the installation of the assistant, the installation is completed after the mobile phone connection computer, safe mobile end of the assistant;
Connect iphone/ipad/ipod or other devices to the computer side's love-thinking Assistant
The following diagram, the connection after the device jailbreak activation status, product type, serial number, production date warranty date, etc., can be seen;
System
Mpls-vpn is widely used in large enterprises and operators, and it is the combination of MPLS technology and VPN. The essence of MPLS is the fast tag exchange, which can greatly accelerate the packet transmission by replacing the traditional routing table recursive query with the lookup tag list. Using MPLS within an operator's network that needs to deal with large amounts of data is an ideal choice, and op
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