Hi! When i try to open a socket connection below:

$fd = pfsockopen("semarmx0034",1705);

where semarmx0034 is the unix machine with apache web server ( 1.3.27 ) installed, this is the error message:

Warning: pfsockopen(): php_network_getaddresses: getaddrinfo failed: Name does not resolv to supplied parameters; neither nodename nor servname were passed. in /dwt/LensTools/apache_1.3.24/htdocs/prova.php on line 2

Warning: pfsockopen(): unable to connect to semarmx0034:1705 in /dwt/LensTools/apache_1.3.24/htdocs/prova.php on line 2

if I try this 

$fd = pfsockopen("localhost",1705);

$fd is a valid Resource id and persistent connection works well.

if I try this 

$fd = pfsockopen("134.32.141.42",1705);

this is the output message:

Warning: pfsockopen(): php_network_getaddresses: getaddrinfo failed: Name does not resolv to supplied parameters; neither nodename nor servname were passed. in /dwt/LensTools/apache_1.3.24/htdocs/prova.php on line 2

Warning: pfsockopen(): unable to connect to 134.32.141.42:1705 in /dwt/LensTools/apache_1.3.24/htdocs/prova.php on line 2

why this function works only with "localhost" parameter in php 4.3.2RC2?

I tested this function on my old php version ( 4.0.6 ) compiled on the same machine and works well with IP address
Is it a unix configuration problem?

Regards