Hello, I bought a VDS and installed it there ISP Manager Lite 5.
Purchased your domain, CloudFlare screwed (for ssl), specify an IP VDS at cloudflare in records. We went to a panel ISP Manager to fasten the domain to VDS. Himself pointed the domain of NS Ki, ip and so on. Domain prekratila if I go there, everything works.
After, I wanted to add and subdomain (name. forum.my-website.ru). Went to ISP Manager and just as I tied domain, tied to a subdomain. Next, I went to this subdomain, however, wrote Chrome DNS_PROBE_FINISHED_NXDOMAIN.
And the most important! When I entered the IP of my VDS in the address bar, I opened a subdomain forum.my-website.ru
Directly on the subdomain to go items, and ip VDS you can go.