If possible we prefer to work with Unix Sockets instead of letting a daemon listen on an IP address. For we let PHP-FPM and Redis listen on a Unix Socket.
This is not always possible or handy, in that case we will configure the service to listen on the IP Address of the hosting account, on the default port of the service.
If you lost the IP of the hosting account, you can ask us or retrieve it by executing via SSH to the hosting account:
echo $VHOSTIP