We are using DDNS for our customers' alarm and NVR installations, so every customer gets their own subdomain like "customer1.ourdomain.tv". I am wondering if there is a way to set up a specific password per (sub)domain? I don't want the customer to be able to log into their NVR and see the MD5-hashed password we use to update all records. They could potentially use it to update other customers' domains.