Connection with PHP Firebird

I use a connection to firebird on port 3050, but one of the clients had to change to port 40494 and the ibase_conect () function returns error: -902 - Unable to complete network request to host "ronsani.ddns. com ". Failed to establish a connection. Connection refused Is there any place in PHP.INI that has to change to work on a port other than the default?