A proxy server acts as a gateway between users and the internet, improving performance through caching and bandwidth control while enabling anonymous browsing and content filtering. Different types of proxies serve various purposes, including web caching, content filtering, and anonymizing functions, enhancing security by hiding internal clients and blocking harmful content. The document outlines the operational benefits of proxy servers, including reduced latency and network traffic, and their application in both commercial and educational environments.

1. FFiirreewwaallll wwiitthh PPrrooxxyy sseerrvveerr

2. What actually is Proxy server?

3. Indirect text to other network.
Proxy is
hardware/software

4. Individuals, universities, companies use
proxy
Proxy acts as a gateway, catch
server/firewall

5. Proxy share connection with others

6. Purpose of using proxies:-
 It improves performance:-
(a) It act as a cache server
(b) It controls bandwidth
 It helps in surfing anonymously:-
(a) It helps in browsing WWW without
any identification
 It helps in filtering request:-
(a) It prevent access to some sites and
protocol.
(b) It helps in time division.

7. Improve performance:-
 Caching:-
(a) It reduce latency.
(b) It reduce network traffic.
 Bandwidth control:-
(a) It is policy based bandwidth
limit.
(b) It deny by network type.

8. Caching helps in speeding up internet access.

9. Caches diminish the need for network
bandwidth, typically by 35% or more, by
reducing the traffic from browsers to
content servers.

10. Working of proxy

11. Working of proxy

12. Caching Proxy
A caching proxy server
accelerates service
requests by retrieving
content saved from a
previous request made by
the same client or even
other clients

13. Web proxy
A proxy that focuses on
World Wide Web traffic is
called a "web proxy". The
most common use of a
web proxy is to serve as
a web cache.

14. Content-filtering web proxy
A content-filtering web proxy
server provides administrative
control over the content that
may be relayed through the
proxy. It is commonly used in
both commercial and non-commercial
organizations
(especially schools) to ensure
that Internet usage conforms
to acceptable use policy

15. Anonymizing proxy
An anonymous proxy server
(sometimes called a web
proxy) generally attempts to
anonymize web surfing.

16. Intercepting proxy
An intercepting proxy
combines a proxy server
with a gateway or router.
Connections made by client
browsers through the
gateway are diverted to the
proxy without client-side
configuration.

17. Performance Aspect

18. Caching
 By keeping local copies of
frequently accessed file the
proxy can serve those files
back to a requesting browser
without going to the external
site each time, this
dramatically improves the
performance seen by the end
user

19.  Only makes sense to
implement this at the ISP
rather than the small
business level because of
the number of pages
available
 Because of dynamic
content many pages are
invalidated in the cache right
away

20. Load balancing (Reverse Proxy)
 A proxy can be used in a
reverse direction to balance
the load amongst a set of
identical servers (servers
inside the firewall and users
outside)
 Used especially with web
dynamic content (.asp,
.php,.cfm,.jsp)

21. Security benefits
 Hide internal clients from external network
 Blocking of dangerous URLs
 Filter dangerous content
 Eliminate need for transport layer routing between networks
 Single point of access, control and logging

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