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naresh kumar
by naresh kumar , IT Desktop Support Engineer , Tech Mahindra - United Arab Emirates

gateway between local network and internet

Chems-Eddine DAHMANI
by Chems-Eddine DAHMANI , Support on Web Security Software , Olfeo

The proxy is used to link a LAN to internet.

 

All the computers in the LAN have a private IP.

 

So the proxy can share an IP (for example a WebSite) to all the LAN and it's better for a security question.

 

You can use a proxy server to do :

 

  • Cache to optimize users surfing (weight, ttl etc..), if the user A go to a page consulted by User B the response time will be faster because of the connection that preceded).
  • Filtering : to allow or deny connection on websites

(ex : acl exampleacl dstdomain .example1.com .example2.com

          http_access deny exampleacl)

  • Authenfication (LDAP, Kerberos, NTLM, Basic Auth)

 

OSI Model : Layer7 : Application

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