Challenge and VPN

At present, many units are faced with this challenge: branch offices, distributors, partners, customers and business trip called at any time after the company's public access network resources, which include: the company's internal information office OA, ERP systems, CRM Systems, project management systems. Now many companies through the use of IPSec VPN to ensure the company headquarters and branch offices and mobile workers a secure connection between.
IPSec VPN for many users, IPSec VPN solution for the high cost and complexity of the structure is a headache. The existence of the following facts: in the deployment and use of hardware and software client, a large number of needs assessment, deployment, training, upgrades and support for users, whether they are economically and technically is a very big burden, long-range Solutions and expensive in-house application integration, IT professionals are no serious challenges. As a result of IPSec VPN over the limit, a large number of enterprises that are IPSec VPN is a high cost, complexity, or even impossible to implement a program. In order to maintain competitiveness, the elimination of internal islands of information, many companies and enterprises related to the needs of different organizations and individuals between the transmission of information, so many companies in need of a simple implementation without the need to change the existing structure of the network, operating costs Low solution.
HLINK VPN features
1.USB (KEY) Plug and Play
2. To support the multi-binding
3. Own address resolution
4. Efficiency, security, stability
5. Expansion of flexible, free
6. Improve the competence of management
7.'s Low-cost solution for VPN
8.'s Maintenance-free VPN solution

What is VPN

VPN's full name in English is the "Virtual Private Network", is translated through the "virtual private network." As the name suggests, virtual private network, we can understand it as a virtual enterprise out of line. It can be a special encrypted communication protocols in the Internet connection in different places at two or more enterprises to establish a network between the proprietary communication lines, is set up like a line, but it does not The real need to lay fiber optic cable like the physical line. It can be compared to apply for telephone line, but not for the cost of laying lines, there was no need to buy routers and other hardware equipment. VPN router technology used to be one of the important technologies currently in the switch, firewall software, such as equipment or WINDOWS2000 also features VPN support, saying, VPN is the core of the use of public networks in the establishment of virtual private network.
Virtual Private Network (VPN) is defined as through a public network (usually the Internet) to establish a temporary and safe connection is through a confusing network of public security, stability of the tunnel. Virtual Private Network is the expansion of the Intranet. Virtual Private Network can help remote users, branch companies, business partners and suppliers with the company's internal network to connect the establishment of credible security and guarantee the security of data transmission. Virtual private networks can be used for the growing global mobile users Internet access in order to achieve a secure connection; corporate Web site can be used to achieve secure communications between virtual private leased circuits, for cost-effective to connect to business partners and customers secure Extranet Virtual Private Network. We combine the following site related to Cisco and Microsoft VPN on the articles you for this information, more and a wealth of relevant aspects of our content will be added for days after.
For different user requirements, VPN There are three solutions: remote access virtual network (Access VPN), virtual enterprise network (Intranet VPN) and the expansion of enterprise virtual network (Extranet VPN), the three types of VPN with traditional long-distance Access network, enterprise and corporate Intranet network partners and corporate networks posed by the Extranet (external expansion) corresponds to.

Why has to open the proxy server?

1st, connects Internet and Intranet acts as firewall (firewall): Because all intranet user through agent server visit outside time, the mapping is only a IP address, therefore the outside cannot visit the intranet directly; Simultaneously may establish the IP address filtration, the limit intranet to the exterior access authority; Moreover, two interconnection intranet, may also carry on the interconnection through the third party agent server to exchange the information. 　　

2nd, saves the IP expenses: If front says, all users only take IP outward, therefore does not need to rent the excessively many IP addresses, reduces the network the maintenance cost. Thus, in the confined bureau has not been possible to connect outside the net with the outside net connected numerous machine through in net's agent server, reduces the expense greatly. Certainly also has its disadvantageous one side, if many network hackers hide their real IP address through this method, but escapes the surveillance. 　　

3rd, enhancement access speed: The itself band width is small, through band width big proxy and goal main engine connection. Moreover the usual agent server establishes a big hard disk buffer (possibly to reach as high as several GB or bigger), when has the outside information through, simultaneously also preserves it in the buffer, when other users visit the same information again, then takes out the information directly by the buffer, passes to the user, thus achieves the enhancement access speed the goal. Uses the agent server to have these advantage? 　　In our country, the surfer divides into 163 and 1692 kinds. 169 users divide into three kinds (throughout the land classification caliber possibly different), a kind of user has outside the net the power, may enjoy internet's all services directly; Another kind is the registration user, the use registration account number surfer, the third order is called the GUEST user, uses account number surfer which male uses, adopts the calling to record spends the system. Does not have outside the net the power user's moderate cost, but can only with the Chinese multimedia information networks in (the IP address by 10 openings) website connection. So-called \ " Has a good swim network world \ " But is the sentence empty talk! You have experienced whether also such pain: Because the bill limits, every day can only pace back and forth on 169, raises is looking at 163 pile of internet information, the resources and the free western-style food, the saliva cocurrent ......Ya! 　　Now has been good, had the agent server, we may go abroad willfully, obtained 163 services with 169 inexpensive prices! Just like front talks about, if we knew that these agent server's address, may use it to arrive at outside the net the net, from 169 arrives 163. What Arab League Z searches and provides is the completely free agent server address, does not have any limit completely, cannot pay any extra cost! On INTERNET free email, main page space, ICQ, FTP, each kind of information resource ......Opens entirely is coming! You still only need pay 169 inexpensive surfer expenses! Moreover, because the goal server can only find out agent server's IP which you use, therefore also has some self-evident advantage, for example was not easy in the chatroom to kick out easily by the human! The use proxy's surfer speed is what kind of? 　　The agent server in fact is in a network high speed buffer, after it accepts the terminal application, to the network server proposed first requests document which and accepts transmits, then transmits the terminal again. When information first process this kind of stopover station, the speed possible more or less to have given a discount. 　　But the agent server is in itself equal to a high speed buffer, if you must glance over the homepage some time ago some people had glanced over, moreover on the agent server preserves time newest record, the agent server does not need to arrive at on the main engine to apply for the data again, but is directly the homepage transmission for you, like the speed in the quite straight union the goal server quick many! Specially the agent server itself has the high speed export, but the server scale the very high words, the influence nearly may neglect to the speed do not record! After the test, the good proxy from sends out applies to receive the document the time less than 10 milliseconds, generally also only then 0.5-1 second, moreover the speed may achieve 5-6K. From the actual operation, cannot distinguish the use proxy nearly and directly with 163 differences, certain areas will also present 169+ agent server to quickly in 163 phenomena! 　　Certainly, if the agent server incorrect words, possible on and so on a several minutes page not to have been able to demonstrate completely, you can not but switch off the browser multimedia and other functions, facing an arid network world! What the home station goal is as far as possible is you provides quickly the better agent server, has a look, to guarantee that frequently you have the harvest greatly!