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  #1  
Old April 29th, 2007, 01:32 PM
zillah zillah is offline
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ISP blocks MSN, google Talk, Yahoo, AIM,,,etc
I am looking to understand how ISP can block some service like MSN messenger or google talk , or yahoo messenger .

Does ISP block port only (layer 4) ? because I am pretty sure it is not the IP address, because there is a workaround if it is the ip address.

Or Are a protocol and the corresponding ports being blocked ?

If it blocks layer 7 , what does it block exactly ? if they are services what does that mean ?

Regards
Last edited by zillah; April 29th, 2007 at 08:26 PM.
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Old April 29th, 2007, 07:33 PM
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z1p z1p is offline
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I"m not sure how they would be doing it and I'm sorry to say we can't help you bypass the restrictions that your ISP have put in place.
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cmd /k ipconfig/all [use to start ipconfig from 'Run']
cmd /k ping <some website, like google or yahoo> [use to ping 'www.google.com' from 'Run']
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Old April 29th, 2007, 08:26 PM
zillah zillah is offline
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Thanks z1p
Quote:
I"m not sure how they would be doing it and I'm sorry to say we can't help you bypass the restrictions that your ISP have put in place.
I do not have problem with my ISP. Therefore I do not need to bypass that.
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Old April 30th, 2007, 04:15 PM
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z1p z1p is offline
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read your other thread, which I hadn't before.

possible ways that a block could be implemented.

based on IP
based on port
based on packet content

The list is basically in ascending order of simplicity and cost (monetary and processing). It also matches up with the difficulty in bypassing.
__________________
  • Please post back your results as they may help others.
  • See this sticky for the definitions of common networking terms.
  • Also, see this post for help with what to include when starting a thread in the networking forum.
  • If we have helped you, please consider supporting Cyber Tech Help with a subscription .
  • Chess anyone?


cmd /k ipconfig/all [use to start ipconfig from 'Run']
cmd /k ping <some website, like google or yahoo> [use to ping 'www.google.com' from 'Run']
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