did you try to use the bitcoin-qt rpc-port:
'port' => 8332,
Yep! I have tried but the 8332 port is closed and the response is
cURL error 7: Failed to connect to 123.321.256.632 port 8332: Timed out (see
http://curl.haxx.se/libcurl/c/libcurl-errors.html)