I've recently had a laugh on a UDM trying to setup IPv6 routing. Somehow, it did not install the default route in the FIB, but the OS was aware of it, so the router was reachable from the outside but did not route packets. I tried adding a route to `::0/0` and it spat at me that a multicast destination was not valid as a route destination. I gave it a route to `::0/1` and it's happily chugging along now. /shrug
I've only been using it for a couple months, but OPNsense (FreeBSD based) is such a solid piece of software. I installed it on a cheap Beelink mini PC with dual 2.5 gb NICs and an N150 processor (model EQ14), and it's been reliable and a pleasure to use as my router. I have a TP-Link Omada setup which I've been pleased with, but I feel no need to purchase one of their gateways.
What do you use for OpenBSD hardware? Is it power hungry? Is it performant?
I had a great stint with OpenBSD on an older Pentium 4 Dell tower a few years back. For basic firewall rules, I had line-rate performance on my NICs. But for a home network I'd love to have something more energy efficient.
I posted this in a sibling comment, but I can confirm Beelink's EQ14 [1] works well with OPNsense (FreeBSD based instead of OpenBSD). The dual NIC model uses the Intel KTI226-V chipset which has rock solid FreeBSD drivers.
Search Amazon for "pfsense mini pc". (smile as you think about how this triggers that one pfsense guy!) Intel N100 or N150 processor, passive cooling, typically 5 1000GBASE-T or better ports, RAM and SSD included. Should be able to get one for ~$200.
My current router at home is a dell vostro 3020 with a quad port intel nic. I usually get dell for the firmware updates they provide well after warranty.
I'd expect it to go nowhere fast. UBNT being weird and inconsistent about IPv6 has been a thing since before I was using their official software... which was from like 2015 through 2018 or so.
I have two ISPs, one with IPv6 (Starlink) and one without (Frontier).
I want to use Frontier for all IPv4, with IPv4 failover to Starlink, and I want to use Starlink only for IPv6.
UniFi networking won’t let you configure this, and I’m not going to SSH in to my UDM to manually set routes, that will be lost at next boot.