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!

The main functions of a proxy server

(1) to set user authentication and billing functions, the user can account for unregistered users the right to Internet access through a proxy server network. And the user's visit, the place to visit, the flow of information to compile the statistics.
(2) user management at different levels, different set of users access to internal or external Internet address filtering, a different set of access rights.
(3) increase in the buffer (Cache), to increase the speed of access, often visit the address to create a buffer zone to greatly improve the efficiency of the popular sites to visit. The proxy server settings are usually a larger hard disk buffer (possibly up to several GB or greater), when the outside world through information, but also to preserve its buffer zone, and then when other users access the same information , Directly in the buffer zone out information to users in order to improve access speed.
(4) Internet connection with the Internet, to act as a firewall (Firewall): since all internal network users to visit the outside world through a proxy server, only one IP address for the map, so outsiders can not directly access the internal network; at the same time can be set up IP address filtering, Restrictions on the internal network to external access.
(5) cost-saving IP: the proxy server to allow the use of a large number of IP address pseudo-saving on-line resources, that is, to use a proxy server to the IP address can reduce the demand for the use of local area network access methods Internet, as if the local area network (LAN) for each A user to apply for an IP address, the cost can be imagined. However, the use of proxy servers, proxy servers can have a legitimate IP address, LAN users can use the other 10 .*.*.* such a private IP address, this can save a lot of IP, to reduce network maintenance costs.
What is HTTP proxy: www for each of the Internet are the familiar, www is used to connect the http request, so we browse the Web, download data (ftp may also have an agreement) that is used http proxy. It is usually bound in a proxy server, and other ports on the 80,3128,8080.
What is a socks proxy: the use of socks agreement is SOCKS proxy server, is a common proxy server. Socks is the bottom of the circuit-level gateway, is DavidKoblas in 1990 developed since then has been on the Internet RFC standards as open standards. Socks are not required to follow specific application of the operating system platform, Socks proxy and application-level proxy, HTTP layer of different agents, Socks proxy simply pass packets without having to be concerned about what kind of application protocol (such as FTP, HTTP and NNTP request) . So, Socks proxy other than the application layer proxy much faster. It is usually binding on the proxy server on port 1080. If you are an enterprise campus network or the Internet, through a firewall or through a proxy server on the Internet access may need to use SOCKS. Under normal circumstances, for dial-up users do not need to use it. Note that the website often used a proxy server is usually devoted to the http proxy, SOCKS, and it is different. As a result, you can visit the website does not mean you can SOCKS visit Internet. Popular firewall or proxy software support SOCKS, but the administrator to open the function. If you are not sure whether you need to SOCKS or whether SOCKS available, contact your network administrator. In order to use the socks, you need to know:
① SOCKS server's IP address
② SOCKS port's services
③ SOCKS the need for user authentication services? If you would like your network administrator to apply for a password and user
Know that the above information, you can fill in this information, "the network configuration", or fill in registration for the first time, you can use a proxy socks.
In practice, can be used as a SOCKS proxy: e-mail and newsgroup software, paging network ICQ, and MIRC chat network uses a proxy server to play the game Lianzhong, and so on a variety of applications among the game.