Sohu search girl also be redirected; try using IP (some agents do not restrict IP, IP can bypass the restrictions of the agent access to some prohibited sites), unfortunately not! (because it is used in the Squidguard configuration file!) IN_ADDR, so you can force users to use domain name access instead of using IP ac
To determine whether a client uses a proxy server, it can be judged from the environment variable information sent by the client.Specifically, just look at the Http_via field, if this field is set, the client uses a proxy server.The anonymous level can be judged by the following table.Give an example of application, you can hang up the agent trial effect: http://
series range.When you create a job step, 10.1 is shown (open the Job Selection steps page and click New ... button, select a subsystem that supports the proxy account, such as PowerShell. You will see a list of accounts that can simulate support job steps. If you do not create any proxy account credentials, the list s
the Web server and improve network access efficiency.The proxy server acts as an intermediary mediator for requests made by the client to the real server. The proxy server stores the requested document in the cache. If there is m
To determine whether a client uses a proxy server, you can judge from the environment variable information sent by the client.
Specifically, look at the Http_via field, if this field is set, the client uses a proxy server.
Anonymous levels can be judged by reference to the table below.
Give an example of an applicat
this multi-exit method, because although CERNET can give Colleges and Universities legal IP addresses, it mostly uses overseas traffic fee or monthly subscription, the cost is high and the bandwidth is limited; however, China Anet, CNCNET, and other operators have relatively low monthly subscription fees, and the egress access speed is fast. In general, CERNET is used as the portal access and necessary egress access (such as access to educational res
To determine whether a client uses a proxy server, it can be judged from the environment variable information sent by the client.Specifically, just look at the Http_via field, if this field is set, the client uses a proxy server.The anonymous level can be judged by the following table.Give an example of application, you can hang up the agent trial effect: http://
websites; During work prohibit employees to watch video, shopping;Access to pictures, test cache, Cache time, X-cache for hit, description squid cache function; first time for Miss;[[email protected] ~]# curl-x192.168.22.30:3128 ' http://www.51cto.com/images/home/images/logo.jpg '-ihttp/1.0 200 OKServer:TengineDate:Sun, 13:42:43 gmtcontent-type:image/jpegcontent-length:5309last-modified:wed, Jan 07:55:12 Gmtexpires:sun, 13:42:43 gmtcache-control:max-age=604800load-balancing:web39accept-ranges:b
site load Balancing, squid service A (222.0.0.10, 172.16.0.10) provides reverse proxy services for multiple Web sites a:web site A1 (172.16.0.20) and Web site A2 (172.16.0.30) deployed on different servers for load balancing, assuming that the Web site a domain www.a.com points to 222.0.0.10, The squid.conf configuration key is as follows: #建立一个名称为 (Aclweba), the access control list (ACL) for the service-s
One, Proxy server1, Proxy server is an important server security function, working in the OSI seven layer model of the session layer. Thus acting as a firewall, proxy servers are often used to connect intertnet and LANs. A proxy
Transferred from: http://www.cnblogs.com/heiing/archive/2010/04/19/1715304.htmlTo determine whether a client uses a proxy server, it can be judged from the environment variable information sent by the client.Specifically, just look at the Http_via field, if this field is set, the client uses a proxy server.The anonymous level can be judged by the following table.
protected] SQUID] # service iptables save
5. Modify the client
Cancel browser proxy
Set the gateway to the IP address of the squid Server
[[Email protected] ~] # Route add default GW 192.168.118.3
[[Email protected] ~] # Route-n
Test web server access
[[Email protected] ~] # Elinks -- dump 1.1.1.2
Iii. Access Control
retrieves the data;
D. the proxy server returns the data obtained from the cache to the client.
In contemporary ServerNoWhen the client needs data:
1. The client sends a data request to the proxy server;
2. the proxy server check
control list. All access requests are denied by default.
Example: http_access allow all
Note: All access requests are accepted.
Cache_dir: defines the disk cache space to store copies of accessed pages or other resources.
Format: cache_dir Type Directory-Name Fs-specific-data [options]
Note:
Type: storage Type, generally set to ufs;
Directory-Name: indicates the cache location. The default setting is cache_dir ufs/var/spool/squid 100 16 256. 100 indi
;
C. The proxy server finds the data you want in the cache and retrieves the data;
D. the proxy server returns the data obtained from the cache to the client.
When the current server does not have the data required by the client:
1. The client sends a data request to the
, select "Use proxy server to access the Internet," and the proxy server's IP address and port number (80) into the address and port items, this completes the client's simple configuration.
2, Server: Install Windows NT and proxy
Through the establishment of a dedicated WWW (FTP) agent to meet the user's main needs, through the erection of SOCKS5 agents to meet the needs of users.
I. Analysis of the user
Existing network situation:
Our campus network through the optical cable has 31 buildings connected, optical cable total length of about 15Km, the vast majority of buildings to achieve structural wiring, connected to the campus network of network multimedia classrooms, teaching base, laboratories, room and so on abou
home page, the home page is sent to the user and a backup is retained at the same time. When other users apply for the same page, Squid immediately transmits the saved backup to the user, making the user feel that the speed is quite fast.
SquidGuard is an auxiliary software for squid to implement filtering, redirection, and access control. It is a free software with powerful functions, easy installation, easy configuration, and fast processing speed. Functions: restrict access by some users bas
1. What is a proxy server?
Proxy ServerProxy ServerThe proxy network user obtains network information. It is a transfer station for network information. The proxy server is between the browser and the other partyWebA
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