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Why do we need proxies?
Anonymity
In this scenario a user want’s to remain anonymous to the website he or she is visiting. When a user visits a site, details such as your IP, what browser you are using etc are available to the site. Using this information the site is usually able to keep track of you. Using a proxy prevents this as the site you are visiting sees the proxy as the end user, effectively hiding your IP.
Security
If users are afraid that somebody is keeping a track of the sites they are visiting via routers and firewalls, then a proxy will go some way to stopping that. These web proxies usually encode the URLs so firewalls and routers have no idea what site the user is visiting.
Access
The most common use of web proxies is to get around firewalls and blocks. Social networking sites such as Facebook and Myspace etc are usually considered detrimental to productivity and are banned from work and school networks. These firewall rules are usually based on IPs and hostnames and are easily overcome by web proxies that rewrite these URLs.
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How Proxies Work
Let us examine how proxies allow users to bypass firewalls and protect their anonymity.
- User tries to access a site that is blocked by a corporate, school or government firewall. The firewall looks at the request, identifies that it is to a banned site and rejects it.
- The user accesses the site via proxy. The firewall sees the request going to the proxy ip. As this is not banned the request is sent through.
- When access sites, your ISP or your system administrators can easily keep track of the sites you are visiting. The visited site also knows your ip.
- When you use a proxy, your ISP or your system administrators can see traffic going to the proxy and don't know what you are visiting. The visited site sees the proxy IP only.
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What are the dangers of free proxies?
Now let us look at some of the dangers of using proxies.
- User tries to access a site that is blocked by a corporate, school or government firewall via a 'hackers' proxy.
- The 'hackers' proxy will then be able to log all the information including usernames/passwords, bank details, cookies, addresses etc, before forwading the request to the web server.
- The 'Hacker' can now use your details including your cookies to access your accounts. Even if you use SSL to login, the hacker can access your accounts via the cookies he grabbed.
- You use what you think is a clean and genuine proxy.
- You owner of the 'clean' proxy is cascading the result to another proxy to protect himself from AUP violation etc. The proxy owner is innocent.
- The request is cascaded to a 'hacked' proxy.
- This 'hacked' proxy will then harvest all your information before forwarding the request.
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DirtCheapProxies are high-anonymous http proxies.
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