What’s a web proxy server?
A
proxy server is a server that goes between clients and web servers, used in
corporate to enforce corporate browsing policy and ensure security. Proxy
servers are commonly used in three modes.
A) Forward proxy
Forward proxy is the most commonly used type of proxy
servers. Clients from intranet request access the web server in internet
through a forward proxy server. Proxy can be used to filter clients from
accessing illegitimate and malicious web contents.
Advantages of forward proxies are
1)
Enhanced privacy and security
2)
Increased performance because of caching
3)
Reduce internet bandwidth usage
4)
Enforce corporate internet policies using ACL’s
5)
Anti-malware and Anti-virus infections
B) Reverse proxy
Reverse proxy is commonly used in web
farms. The response to the client is returned as if it came directly from the
proxy server. Advantages of reverse proxy in server farm are as below.
1) Load
balancing of web servers
2) Caching
3) Compression
4) Firewall
5) SSL
offloading
C) Transparent proxy
A
transparent proxy server is a proxy server configured in such a way that no
client side (browser side) configuration is required. The www requests are
intercepted at network level by making used of WCCP protocol or route map in
network switches and forward the browsing request to proxy server. Transparent proxies are mostly used in ISP’s
to reduce the bandwidth usage by making use of content caching feature in proxy.
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