I actually had the same deal with firewalls and prefixes, since I want to direct traffic to my server and its address obviously depends on the prefix. Turns out

I actually had the same deal with firewalls and prefixes, since I want to direct traffic to my server and its address obviously depends on the prefix. Turns out OpenWrt has a feature for this too [0], meaning you can use a destination address like "::1234/-56" in your firewall rules. [0] https://openwrt.org/docs/guide-user/firewall/fw3_configurations/fw3_ipv6_examples#dynamic_prefix_forwarding https://openwrt.org/docs/guide-user/firewall/fw3_configurati...