Comment 1 for bug 909389

For XP, the following will work:
    netsh firewall add allowedprogram "C:\Prorgram Files\ubuntuone\dist\ubuntuone-syncdaemon.exe" "Ubuntu One" ENABLE

For Vista and beyond we need something like the following, since the above is deprecated:
    netsh advfirewall firewall add rule name="Ubuntu One" dir=in action=allow program="C:\Program Files (x86)\ubuntuone\dist\ubuntuone-syncdaemon.exe" enable=yes