We need to open a special port in Windows Firewall so that it can be accessed from outside. We are opening 1093(TCP) port in Windows firewall as an example.
1 Open Windows Firewall with Advanced Security
Star Server Manager -> Tools -> Windows Firewall with Advanced Security.
2 Create a New Rule
3 Select “Port” in “Rule Type”
4 Apply to TCP or UDP and entry port number
Select Either UDP or TCP and Input Special Ports Number next to Specific Local Ports
5 Select the Option Allow The Connection
6 Select All Options under “When does The Rule Apply?”