IP Block is the Problem, you are Blocking more sites as the to block...
I think a Server has 100 Sites if you block the IP all 100 Sites are blocked. 
You have a big Problem you must block a Site Xy and the UBS.Com or an other 
bigger Firm is on the same server.
Greetins
Xaver
  ----- Original Message ----- 
  From: Oliver Bolliger 
  To: Xaver Aerni 
  Cc: [email protected] 
  Sent: Tuesday, February 17, 2009 5:14 PM
  Subject: Re: [swinog] Post from Canton de Vaud


  this is not the right way to block access to a site as i can setup my own dns 
or use foreign nameservers


  but what is the best method? blocking ip traffic to the site can also mean to 
block legitimate traffic to a shared hosting server!?


  cheers
  oliver



  On Feb 17, 2009, at 4:57 PM, "Xaver Aerni" <[email protected]> wrote:


    When the ISP block it only by DNS Filtering???
    I think to block 1 side is a DNS Filtering the easyest and fastest way.
    Greetings
    Xaver
      ----- Original Message ----- 
      From: Yann Gauteron 
      To: [email protected] 
      Sent: Tuesday, February 17, 2009 4:50 PM
      Subject: Re: [swinog] Post from Canton de Vaud


      You're assuming that the biggest ISPs will apply the filtering at the 
entrance of their network, which is not necesseraly true. They can also decide 
to filter closer to their access equipments. This would mean that peerings with 
other ISPs or BGP-tiered enterprises would be unfiltered.

      Depending where the filtering is applied, professional access could also 
be prevented to be filtered.



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