Using the Entware
inadyn package on DD-WRT
Dynamic DNS is a great tool for being able to keep one or more services that rely on a specific DNS name record being accurate. In most cases, DDNS is useful for something like your home ISP IP address which is often dynamic or "sticky". Unless provided (or you pay for the priviledge), residenital ISP broadbrand plans don't usually offer static IP.
DD-WRT includes DDNS (inadyn), but there is one problem. It's very old. DD-WRT includes the version
1.96-ADV. While having older software isn't ideal there is one key area that is a potential security issue. SSL support. The standard DDNS implementation in DD-WRT means you are sending your DNS update request over plaintext. This is bad. Being able to sniff credentials for your chosen DNS provider over the wire means you are wide open to someone being able to intercept and modify the request. In addition, the crendentials used may also be tied to a service multiple services. While it would require some effort and en