Is it possible to manage firewall access to an OVH server?
Depending on the hosting environment, there appears to be an OVH Control Panel available that allows you to reach a firewall management page.
OVHcloud Control Panel:
If you have access to it, you may wish to try using this documentation to modify the OVH environment's firewall rules.
If you find yourself unable to access those locations, you may wish to reach out to OVH support.