submitted 5 months ago by Cyber@feddit.uk to c/selfhosted@lemmy.world

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After being home for weeks, I went away for business, the 1st night away there was a brief powercut and the firewall (on a UPS) seemed to get stuck.

So, that's no DNS, DHCP, or connectivity between wifi and LAN... All due to (admittedly aging) hardware issue.

Since then my entire home system has had issues whilst it all settles down.

It made me think about getting some redundancy into the system to handle a single failure.

So,.can you give me any insights into High Availability like CARP (for pfSense), VM failover (on Incus?), mesh wifi, Home Assistant, etc?

Of course there are going to be single points, like ISP line, etc, but seems like something to test out.

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[-] frongt@lemmy.zip 0 points 5 months ago

Two firewalls in HA.

You can also get a little Cradlepoint or something with a SIM card as a backup Internet connection if you need uplink redundancy.

[-] Cyber@feddit.uk 1 points 5 months ago* (last edited 5 months ago)

That (2 FWs) was what I was considering initially.

But, looking at some other posts, I'm starting to rethink my design as I only have 1 WAN connection, then I only need 1 FW (maybe). SIM would be rarely used, I'm not sure the overall cost would be worth it

So separating FW from DHCP & DNS might be a better solution.

this post was submitted on 31 Jan 2026

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