I have one of my distributed application running with UI components in 1and1 (220.127.116.11) and the backend components in Digital Ocean(18.104.22.168). The issue is I'm not able to connect these applications from my network. Everytime I'm getting the following issue.
This site can’t be reached
22.214.171.124 took too long to respond.
Try disabling the Xfi Advanced Security feature as a work-around for now and see. It's buggy ! And there is currently no way for an end-user to be able to whitelist anything;