If you login to the OVH control panel and notice that the monitoring is showing Red instead of Green, this is due to their monitoring servers not being able to connect to your VPS. You simply need to add their IP’s for monitoring that they provide in the control panel to your Windows 2012 VPS firewall.
The following command will add a new rule called “OVH Monitoring” and allow the remote IP’s specified in the OVH Control Panel.
netsh advfirewall firewall add rule name="OVH Monitoring" dir=in action=allow remoteip="92.222.184.0/24,92.222.185.0/24,92.222.186.0/24,167.114.37.0/24,192.99.166.111/32"