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Fake IP Address
When you connect to a website, it can see
your IP address as the "Remote IP" or "Remote Address". When
you surf through a proxy server, these fields contain the IP
address of the proxy server instead of your own IP address.
So the website will see the address of the proxy instead of
your actual address.
But all non-anonymous proxies usually put the IP addresses
of their clients (i.e. of the computers using those proxies)
in either of the two following request headers (variables):
"HTTP_CLIENT_IP" or "HTTP_X_FORWARDED_FOR_IP" There are no
strict standards, so one proxy may be sending the IP with "Client_IP"
variable and another with "X_Forwarded_For_IP". There is not
much difference between them but they are never used
together - either one or the other.
So, if the proxy you are using is not anonymous, the website
will be able to see you true IP address in one of these
fields.
Requests that are generated by anonymous servers do not have
these fields (that's what makes them anonymous).
The thing is that you can set A4Proxy to create these
fields, and put there "fake" IP addresses (they are
generated as random numbers, so they are different for each
request). As the result, the web site which you are visiting
will "think" that you are visiting it through a
non-anonymous proxy server (while in fact it is a truly
anonymous server with an additional fake field generated by
A4Proxy).
Not all web sites will look for these fields (Client_IP or
X_Forwarded_For_IP). However, those which do look for them
will definitely be confused as the fake IP address will be
different for each request.
It may be a good idea to switch on one of these options (and
it is not important which one).
Finally, if you want a particular address to be sent to the
website in one of that field, you will need to create a
modification for that field on the Browser Options tab, in
addition to enabling the appropriate Simulate... option.
[The information from
http://www.inetprivacy.com/a4proxy/fake-ip-address.htm]
What is an anonymous proxy server?
Any web site in the world can track
your movements through its pages and monitor your
reading interests using your IP address, a unique ID
assigned to each computer on the Internet. Depending on
the policies of the Internet resource, you might not be
able to get access to the information you need. Also,
your visit can be registered and used later to gather
some personal information about you.
It is widely agreed that governments and organizations
publish dummy websites on controversial topics for the
purpose of monitoring interested parties. Also, this
information, in combination with your e-mail address,
can be used to increase the number of targeted
advertisements fired at you by the marketers.
Using only your IP address and the information about
your operating system, a Web site can automatically
exploit security holes in your system using some
not-very-complex, ready-made, free hacking programs.
Some of such programs may just hang your machine, making
you reboot it, but other, more powerful ones, can get
access to the content of your hard drive or RAM. The
anonymous proxy prevents this by hiding your IP address
so that no one can access your computer via the network.
In most cases, however, proxies do inform the target
server about the address of the computer that made the
request, transmitting your IP-address in different
forms.
Anonymous (real anonymous!) proxy servers don't transfer
the information about the IP-address of the client, and
thus effectively hide the information about you and your
surfing interests. Besides that, some proxy servers can
also hide the very fact that you are surfing through a
proxy server! Anonymous proxies can be used for all
kinds of Web-services, such as Web-Mail (MSN Hot Mail,
Yahoo mail), web-chat rooms, FTP archives, etc. What
is a public proxy server?
It is a proxy server which is free and
open for everybody on the Internet. There is quite a
large number of public proxy servers in many countries
but most of them are not anonymous. Is the "anonymous proxy" I came across on the Internet really
an anonymous one?
Most probably, No. We have studied more than 8,000
public proxy servers and found that only a few hundred of them are true
anonymous proxy servers. Although almost half of all servers call
themselves "anonymous" because they do not transfer the client's IP
address in the standard way, nevertheless the address is present in
their requests in other different forms and therefore they do not
provide any anonymity. Besides, we found that some proxies transfer the
IP address of the client occasionally, from time to time. What
is ANONYMITY 4 PROXY (A4Proxy) intended for?
The simple way to travel the Internet anonymously has
been around for quite some time - anonymous proxy servers. They generate
unique IP addresses that shield your current connection when relaying
requests for web pages and files from ftp archives. The only sad thing
about them is that they are difficult to find, and it is even more
difficult to test their real anonymity and IP isolation factors. That is
what A4Proxy is doing. This proxy server will store your proxy server
list in a convenient database, check your "proxys" for 15+ parameters
(anonymity, location, speed, response time, proxy header variables,
support for HTTPS and FTP...) and help you to surf through them.
A4Proxy stands between your browser and the Internet, receiving requests
for web pages from your browser and redirecting them to the anonymous
proxy servers in its database. These proxy servers connect to the sites
on your behalf and fetch the pages to A4Proxy, which then sends them to
your browser to display. As a result, the websites see the IP address of
the proxy server instead of your own IP address. As all traffic travels
through A4Proxy, you can monitor outgoing requests as they are sent out
by your browser and modify them if you like, block cookies, change proxy
for each request, send a fake IP address and a lot more. A4Proxy fully
supports HTTPS and FTP, so you will be able to logon to secure sites and
FTP directories anonymously. A large proxy list with hundreds of
anonymous proxy servers located all over the world supplied with the
program. You can also share the anonymous connection over a LAN.
Will A4Proxy work with mIRC or other IRC client? How do I set
it up to send anonymous e-mail with ordinary e-mail software? What about
newsgroups?
A4Proxy works only with your web browser and download
managers like GetRight. With A4Proxy, you can't send anonymous e-mail
with ordinary e-mail clients (but you can use web-based e-mail accounts
like hotmail.com), and you can't use it with chat programs or newsreader
software. If you need anonymity for FTP (with standard FTP clients like
CuteFTP), Usenet News (with standard newsreaders, e.g. Outlook or
Agent), IRC (with standard IRC software like mIRC), ICQ and Email (POP/IMAP),
have a look at our AntiFirewall product,
[The information from: http://www.inetprivacy.com/a4proxy/anonymous-proxy-faq.htm]
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