I'm trying to get to the bottom of a connection problem.
My payment processor uses port 4330 and has no firewall for incoming connections. My hosting company blocks this port by default but has allowed outgoing connections to the IP addresses of the payment processor for me on port 4330.
When I try to make a connection to the payment gateway it always connects but it takes over three minutes, somewhere there is a bottleneck but I don't know where.
I can connect to the payment gateway from my local server with no problem at all so the problem is between the live server and the gateway.