In my SLES 11 Sp1 i created a web application in PHP (version 5.2.14).
In this application i use some web services residing on another server on the same LAN.
Using the soap extension in PHP, when i try to create the soapclient object, the system
tells me that PHP can not access the WSDL.
Then i try to run this simple code:

<?php
$url = <any url>
$ff = fopen($url, "r");
print_r($ff);
?>

In this case i receive the error:

Warning: fopen(<any url>): failed to open stream: HTTP request failed! in eval() (line 2 of /srv/www/htdocs/hcportal/modules/php/php.module(74) : eval()'d code).

The system is configured as follows:
- Firewall disabled;
- PHP: suhosin.simulation = On
allow_url_fopen = On

How we must act in order to unlock this protection?

Thanks in advance