MY QUESTION: I want to run a web application on sub-domain subdomain.example.com. Sub-domain is created by ISP on their DNS server and forwarded to external web host. None of clients can access the sub-domain from within LAN. It works outside of LAN, even on different ISP. I am using Windows 2012 R2 domain controller. Router has port 80 open.
Tried:
- Created A record on local DNS with IP of my ISP DNS server.
- Outbound access from firewall is not restricted.
- Created separate zone on local DNS with A record pointing to ISP DNS server.
What am I missing? I am thoroughly lost.