Hi Philippe,

It might be that you are running a firewall that is blocking port 59590, which is the TCP port in question here. As far as the Windows firewall goes, this is usually taken care of effortlessly by the NINA installer but, now and then, it seems that the firewall rules to open that port do not take. It could also be the case that you may be running additional anti-virus software that can be blocking it as well.

To manually emplace the firewall rules, you can do the following:

1. Open a cmd.exe or PowerShell window in Administrator mode (right-click the icon for either, select Run as Administrator)
2. Run the following 3 commands in the order listed:

netsh http add iplisten ipaddress=::
netsh http add iplisten ipaddress=0.0.0.0
netsh http add urlacl url=http://+:59590/ user=Everyone

This will ensure TCP/59590 is open as far as the Windows firewall is concerned.

/dale