Hi @karen-zheng,
Do you have a third party firewall software installed in your server device? If so, please see the User Manual on the section “Troubleshooting” -> “Firewall Settings on Primary Machine”. Also, if you have a VPN installed in your server machine, you may also check the section “VPN (Virtual Private Network)” just below “Firewall Settings on Primary Machine” and follow the troubleshooting steps there.
https://forum.spacedesk.netuser-manual
You may get the diagnostic logs by following these steps:
–- open the spacedesk Console window app by clicking the spacedesk tray icon on your task bar’s notification area
— On the Console window, click on “Diagnostics”
— Click Save All Information button
Saving all information will take a few seconds, then please send us the whole folder which contains all the diagnostic logs collected. Please right-click the folder -> Send to -> Compressed (zipped) folder, then attach the *.zip file on your next reply.