Hi @mnajera,
Could you please send us the following info:
Primary Machine
– operating system (Windows 8.1/10)?
– graphics adapter (AMD/Intel/Nvidia)
– network connection type (wired/wireless/USB tethering/WiFi Direct)
Secondary Machine
– Viewer type (Android/iOS/Windows/HTML5)
– network connection type (wired/wireless/USB tethering/WiFi Direct)
What is your current network profile on your primary machine? Public or Private?
Aside from Windows built in firewall, do you have third party firewall software (e.g. McAfee)?
When you set the rule above, is the program path set to C:\Windows\system32\spacedeskService.exe?
Do you maybe have VPN (Virtual Private Network) currently active?