More Two-Tier Configuration Hints

Pass the real IP address from front-end to back-end for proper statistics tracking. SQUID declares the HTTP_X_FORWARDED_FOR variable. To use this value, add the following code to /bitrix/php_interface/dbconn.php:

if(strlen($_SERVER["HTTP_X_FORWARDED_FOR"])> 0&& $_SERVER["REMOTE_ADDR"]=="127.0.0.1")
{
if($p = strrpos($_SERVER["HTTP_X_FORWARDED_FOR"], ","))
  { 
  $_SERVER["REMOTE_ADDR"] = $REMOTE_ADDR = trim(substr($_SERVER["HTTP_X_FORWARDED_FOR"], $p+1));
  $_SERVER["HTTP_X_FORWARDED_FOR"] = substr($_SERVER["HTTP_X_FORWARDED_FOR"], 0, $p);
  }
else
  $_SERVER["REMOTE_ADDR"]=$REMOTE_ADDR=$_SERVER["HTTP_X_FORWARDED_FOR"];
}

Note! This handler is not required if mod_realip is used. If this is the case, add "RealIP 127.0.0.1" or other back-end address to the server configuration file (httpd.conf) to have Apache rewrite the address.

Disable KeepAlive in the back-end Apache configuration. Since front-end usually runs at the same machine, faster release of resources will result in the performance gain.

Configuring Web Systems For Best Performance