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Message: <blockquote data-quote="rockcity68" data-source="post: 13292209" data-attributes="member: 250998">Windows uses a HOSTS (located in  %systemdrive%/windows/system32/drivers/etc) file to maintain a personal  list of web addresses. Any time a request is made for a URL, the HOSTS  file will be checked first. If a corresponding address is found you will  be directed to that IP without first consulting a DNS Server. The  original intent of this file was to define where sites exist; we will  use it in this context to define where they don’t exist. Lets first look  at a HOSTS file entry127.0.0.1 localhost  This is the loopback address for your machine for those cases where an  application needs to reference the local machine by IP address- the  loopback address will always be valid. This entry should never be  changed.  Now lets add an entry to block  127.0.0.1   <a href="http://www.yahoo.com/" target="_blank">www.yahoo.com</a>We are telling our local machine that Yahoo actually exists on the local machine. Any request for   <a href="http://www.yahoo.com/" target="_blank">www.yahoo.com</a>  will be directed to the local machine and therefore effectively  blocked. You could also use the IP of another website if you wanted to  be creative.Let’s take a closer look at a URL   <a href="http://www.yahoo.com/" target="_blank">http://www.yahoo.com</a> <ul> <li data-xf-list-type="ul">http://  defines the transfer protocol in this case Hyper Text Transport  Protocol; this is the standard for viewing websites. Another common  protocol is ftp:// for file transfer.</li> <li data-xf-list-type="ul">www is the host</li> <li data-xf-list-type="ul">yahoo.com is the domain</li> <li data-xf-list-type="ul">.com is further classified as the TLD (Top Level Domain)</li> </ul>A HOSTS file entry will disregard the transfer protocol so it isn’t  needed. However, the host does play an important role. A webmaster may  choose to define a host for his/her website. “WWW” has become the  universal standard for the default host. It is just as common to define a  site with no host as well. This means that as far as DNS goes <a href="http://www.yahoo.com/" target="_blank">www.yahoo.com</a>  & yahoo.com are two totally different sites, even though they  resolve to the same place. Because of this to effectively block the  site, you must also block all hosts. This would usually mean:127.0.0.1 yahoo.com  127.0.0.1   <a href="http://www.yahoo.com/" target="_blank">www.yahoo.com</a><a href="http://www.overclock.net/t/44143/how-to-use-the-hosts-file-to-block-websites-in-windows" target="_blank">http://www.overclock.net/t/44143/how-to-use-the-hosts-file-to-block-websites-in-windows</a>  <img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /><img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /><img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /><img src="/styles/default/xenforo/smilies/default/D.gif"  class="smilie" loading="lazy" alt=":D" title="Big grin    :D" data-shortname=":D" /></blockquote>

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