Router Tester 

Router Tester is an application to help DynSite users to accurately identify the path to the HTML status page of their routers.
status page html routers dynsite

Simple Failover 

Keep your web shop open with Simple Failover. The concept really is simple.Iit continuously monitors your servers to find out which are up and which are down, and then it dynamically updates your DNS records accordingly.
failover failure high availability monitoring backup website redundant dns failover robin robin load balancing

Dynamic Update Tester 

Dynamic Update Tester is an application to test dynamic updates (RFC2136) on DNS servers. The latest version supports secure updates using transaction signatures (RFC2845). This is a test application not an automatic IP updater.
dns server update rfc2136 rfc2845 tsig transaction signature network