Dynamic Firewall Aliases in OPNSense

Overview

In an ideal world you would create firewall rules that target specific source IP addresses. Unfortunately many cloud services utilize multiple large ranges of IPs that change. Which make Static Aliases a pain to manage. This article will show you how to create Dynamic IP Aliases in OPNSense.

Aliases

Aliases are very power

Reference

https://docs.opnsense.org/manual/how-tos/edrop.html

https://www.cloudflare.com/ips/