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  1. Install your favorite flavor of Linux.  We currently suggest CentOS 6.8 or better.
  2. Install apache with the mod_cache add-in.
  3. Create a /etc/httpd/conf.d/noctel.conf file with the following contents:
    <IfModule mod_disk_cache.c>
     CacheRoot /var/www/cache/
     CacheEnable disk /
     CacheDirLevels 5
     CacheDirLength 3
     CacheMaxExpire 86400
     ProxyRequests On
     ProxyVia On
     ProxyPass /polycom
     ProxyPassReverse /polycom

    <VirtualHost *:80>
     DocumentRoot /var/www/html/
     ServerName noctel-local-cache
     ErrorLog logs/noctel-error_log
     CustomLog logs/noctel-access_log common


  4. Start or reload your apache configuration.  This can typically be done by issuing the /etc/init.d/httpd restart or services httpd restart command.
  5. Ensure your firewall / iptables is open for the phones to access port 80.
  6. Configure your DNS server to answer to the IP of your web server for ONLY  You will need to create an A record for this.