So I’ve just installed it on a clean ovh vps, I haven’t the issue no more, but I have no network working so I can’t access nethgui 
Edit:
So after some try, I’ve followed this Install NS7 on Centos 7 on OVH VPS
So I’ve just installed it on a clean ovh vps, I haven’t the issue no more, but I have no network working so I can’t access nethgui 
Edit:
So after some try, I’ve followed this Install NS7 on Centos 7 on OVH VPS