I have a domain named: mydomain.com. The website mydomain.com and some sub domain like sub1.mydomain.com, sub2.mydomain.com are hosting on a shared hosting (public IP address: 188.8.131.52).
Now, i want to hosting a sub domain: sub3.mydomain.com on a windows server VPS. This VPS has no relation with the above shared hosting (not in the same LAN, not same provider). This VPS has public IP address: 184.108.40.206
Following several guides on the internet, i have deployed sub3.mydomain.com on IIS on the VPS with some information:
Host name: sub3.mydomain.com
Binding: type http on port 80 with IP Address: *
On VPS's DNS Manager tool, I have created a Primary zone in Forward Lookup Zones named mydomain.com.
Inside this zone, i create a New Host (A or AAAA) record with name sub3 and the IP address to 220.127.116.11
On the domain manager page of domain provider, I have configure:
host: sub1 type A point to 18.104.22.168
host: sub2 type A point to 22.214.171.124
host: sub3 type A point to 126.96.36.199
I have also enabled some firewall rules on VPS:
File and Printer Sharing (Echo Request - ICMPv4-In)
World Wide Web Services (HTTP Traffic-In)
World Wide Web Services (HTTPS Traffic-In)
The sub1, sub2 subdomain and top domain (mydomain.com) work well but the sub3.mydomain.com's server DNS address could not be found. How can i make it work? I did some step wrong?