I can successfully create a ssh connection within a index.php file by using ssh2_connect(). But when I try to create a web service by using the same code, I got "Unable to connect to a.b.c.d (IP address) on port 22" error. In other words, if I run the command "php index.php" under shell prompt, it works perfectly; but if I request the same file through my Web browser ( http://mydomain/index.php), I got an unable to connect error. Is there someone having any idea about that. Thanks a lot for your help. (REHL 5 with PHP 5.1.6)