I think you can do this with the IIS Redirect module.

https://www.google.com/se...ceid=chrome&ie=UTF-8

You want the inverse of what this fellow wants... https://forums.iis.net/t/...+on+IP+address+range

Posted By Stuart on 01 May 2020 05:15 AM

Hi, we run a multi portal instance of DNN and would like to allow access to any of the portal login pages to 1 or 2 specified IP Address only, therefore restricting access to our own network users only..
I see lots of example of limiting whole websites to IP,  but I want the public to be able to access the sites as normal just not the login pages.

I believe this can be done via the web config so just looking for best examples how we might achieve this and perhaps re-direct blacklisted users somewhere else (maybe a message page)?

AFAIK DNN 9 has that option under security > login settings > login ip filters

 

 

Is that option not just for host/administrators though, I want to redirect any user not whitelisted from the login page.

Hmm, I though it was for anyone.
If you need more specific filtering a custom authentication provider (requires .net development) is the only reliable option I know of.

IIS Redirect module is good solution if it's available/installed on your server. Probably way easier than developing a custom authentication provider.

Another solution is to use Cloudflare. I made the move to Cloudflare a year ago and it's working really well. I removed all the IIS Redirect rules and use Cloudflare firewall rules instead.

That is a very good idea