I don't know what the maturity cutoff you're using here is, but I'll draw my line at "deploying on AWS". If you're on AWS, you have really no business exposing an admin interface on a routable address. Deploy it on an internal address and have admins use a VPN to reach it.

There are organizations on AWS that have publicly-routable admin interfaces. They should all be working on plans to migrate away from that, and, in the meantime, they should be extra careful about authentication and monitoring.

If you're too small to have a non-routable admin interface, you are definitely too small to pay for security products.