Automatic redirect to backup server?

RouterOS Beginner Basics
1

Ok, I searched the forums, and see a few answers for “outgoing” redirects, but what I want is the following.
How does one make an auto-redirect in MT from a web server (for example), to a backup web server on the same LAN. For example, if I want to take my web server down for updates, I’d like to automatically re-direct incoming HTTP requests to another machine that responds with some simple web pages informing the users that I’m working on the main server.

So, if main web server is at 192.168.1.20, and backup server is at 192.168.1.30, how can I get MT to test the .20 address, and if it’s down, either redirect or change NAT to make all incoming packets go to the .30 address?

I would think a script with a ping test should do it, but how to put this together with the various rules evade me…

Thanks

2

Bump…
So, any ideas out there? Or is it simply not possible?
Thanks

3

this is doable. create a netwatch script that on UP / DOWN it just modifies your dst-nat rule. If you need specifics maybe you can attempt it and see how far you get an post details where you’ve gotten stuck.

4

Thanks for reply. I know nothing about netwatch, but see examples in the forums. I’ll have to read up on it I guess. Thanks for pointing me in a direction that may work…