I am trying to understand how Drop In Mode, LAN Bypass and Authoritative DNS might work together on 305. I am considering using the 305 in front of a web server to manage multiple WAN links. A few questions:
In order for the LAN Bypass to work, LAN 1 need to be in Drop In Mode?
LAN 2 and LAN 3 would be connected to other ISPs.
How would the DNS be configured? I am thinking that Authoritative DNS would be needed so that the 305 could hand out the IPs of the WANs.
If the 305 went down, the LAN Bypass will connect WAN 1 to LAN3 – this is perfect – as it keeps the web server connected to the internet. What about DNS? Because the 305 is no longer online, what will happen when a client computer does a DNS lookup? I am guessing, it would get a DNS lookup error and would not resolve the domain name to the IP of WAN1.
If all this is correct, what do you recommend? If it makes a difference, I am currently using dyndns.com as the Authoritative DNS. It looks like there is a way to put my account info into the 305, I am not sure what this will do or this this might help in the case when the LAN Bypass is active.