Linux11 Proxy Server

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Information about Linux11 Proxy Server
Education

Published on March 5, 2014

Author: jainulmusani

Source: slideshare.net

Description

Proxy Server - Linux

1 Proxy Server

Proxy Server • A proxy server is a program that is installed on a machine that has direct access to the internet. • The program accept request from the user on LAN and enables them to access the internet from their work station. 2

Proxy Server • The process is encapsulated from the use that is the users can’t distinguish between live connectivity to the internet but proxy based access to the internet. 3

Proxy Server • There are various types of proxy server available some of the most commonly used proxy servers are: 1)Squid internet object cache proxy 2)Microsoft proxy server 2.0 3)Apache server 4

Squid Proxy Server • Squid is caching proxy server, which improves the bandwidth and the response time by caching the recently requested web pages. 5

Squid Proxy Server • Squid provides proxy and cache services for HTTP, FTP, and various other protocols. 6

Installing the Squid Proxy $rpm -ivh squid-2.5.STABLE63.4E.12.i386.rpm 7

Squid Proxy Server configuration file (1) $ vi /etc/squid/squid.conf Providing a name for the proxy server machine. visible_hostname proxy.MySite.com In the above example, instead of proxy.MySite.com specify the hostname of your machine. 8

Squid Proxy Server configuration file (2) Specifying the interface and port number on which the proxy server should listen. 9

Squid Proxy Server configuration file (3) Example: your proxy server has an ip address 192.168.60.70 which belongs to the local area network 92.168.60.0/24 Change the variable http_port as shown. $ http_port 192.168.60.70:3456 10

Squid Proxy Server configuration file (4) Now start the squid proxy services_ $ /etc/init.d/squid start 11

Test the Squid Configuration In Firefox web browser, to set the proxy settings goto Edit  Preferences and window similar to shown next slide will be displayed. 12

Test the Squid Configuration 13

Test the Squid Configuration 14

Using Apache Web Server To Configure Proxy Server  Apache web server is pre-installed with RedHat distribution  No need additional installation  Easy to configure on Linux system 15

Types of proxy servers 1) 2) 3) 4) Transparent Proxy Anonymous Proxy Distorting Proxy High Anonymity Proxy 16

Transparent Proxy  Server identifies itself as a proxy server.  Makes the original IP address available through the http headers.  Used for their ability to cache websites. 17

Transparent Proxy  Do not effectively provide any anonymity to those who use them.  Use of a transparent proxy will get you around simple IP bans.  Transparent in the terms that your IP address is exposed, not transparent in the terms that you do not know that you are using it. 18

Anonymous Proxy  Server identifies itself as a proxy server.  Does not make the original IP address available.  Detectable, but provides reasonable anonymity for most users. 19

Distorting Proxy  Server identifies itself as a proxy server.  Make an incorrect original IP address available through the http headers. 20

High Anonymity Proxy  Server does not identifies itself as a proxy server.  Does not make available the original IP address. 21

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