I have recently installed ISPConfig 3.1 using perfect server tutorials for Ubuntu 16.10 on Linode, and I am facing problem with its DNS records. I have successfully configured DNS for the domain and added a website, but when I added an A record as test.youthcanvas.com in ISPConfig, its not resolving. Seems like all DNS is working from the default DNS manager in Linode which is set as a master DNS. I have another setup of ISPConfig on different server, with same configuration but different domain, that is working fine from last 8 months. Please help with fixing my DNS