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Cake day: January 28th, 2025

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  • No, the router being the SPOF (single point of failure) is totally avoidable.

    At mny home (no SaaS services offered, but critical “enough” for my life services) i have two different ISPs on two different tecnologies: one is FTTC via copper cable (aka good old ADSL successor) plus a WFA 5G (much faster but with data cap). Those two are connected to one opnSense router (which, indeed, is a SPOF at this time). But you can remove also this SPOF by adding a second opnSense and tie the two in failover.

    So the setup would be:

    • FTTC -> ISP1 router -> LAN cable 1 to port 1 of opnSense n.1
    • FTTC -> ISP1 router -> LAN cable 2 to port 1 of opnSense n.2
    • FWA -> ISP2 router -> LAN cable 1 to port 2 of opnSense n.1
    • FWA -> ISP2 router -> LAN cable 2 to port 2 of opnSense n.2

    Then in both opnSense i would setup failover multi-WAN and bridge them together so that one diyng will trigger the second one.

    edit: fixed small errors