Hide internal clients from external network
http://stableproxies.com/
Blocking of dangerous URLs
Filter dangerous content
Eliminate need for transport layer routing between networks
Single point of access, control and logging
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.
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.
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