blocked sites

This is a discussion on blocked sites within the Networking/Device Communication forums, part of the General Programming Boards category; hi all i blocked some sites like "mail.com"... so on.. but there is some sites to open these blocked sites(eg: ...

  1. #1
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    blocked sites

    hi all
    i blocked some sites like "mail.com"... so on..
    but there is some sites to open these blocked sites(eg: kproxy.com,calculatepie.com... like that).

    how these sites are opening..
    i think you people understand my thread.

    any help

    thank you

  2. #2
    Lean Mean Coding Machine KONI's Avatar
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    Those are proxy sites, which means they basically act as a relay between the user and the server. If the access to the server is blocked but not the access to the proxy, the user can use the proxy (which he has access to) and tell the proxy to fetch for him data on the server, which are then send to the user by the proxy.

    user = A
    server = B
    proxy = C

    You blocked this:
    A -----> B

    This is allowed:
    A -----> C
    C -----> B

    thus, this is allowed:

    A -----> C -----> B

  3. #3
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    Quote Originally Posted by KONI View Post
    Those are proxy sites, which means they basically act as a relay between the user and the server. If the access to the server is blocked but not the access to the proxy, the user can use the proxy (which he has access to) and tell the proxy to fetch for him data on the server, which are then send to the user by the proxy.

    user = A
    server = B
    proxy = C

    You blocked this:
    A -----> B

    This is allowed:
    A -----> C
    C -----> B

    thus, this is allowed:

    A -----> C -----> B
    how can i block these sites also, in my system..

  4. #4
    Lean Mean Coding Machine KONI's Avatar
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    Block all the proxies in the world.

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