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this post was submitted on 16 Apr 2026
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Not familiar with opnSense, but on your PC, you can check the address it assigns - if it's /128, it's a single address.
My ISP does not assign a prefix for delegation unless you specifically ask for it. I had to add "request_prefix 1" to my dhclient.conf file to get a /64 I assume opnSense has a friendly setting somewhere for that. For me, the key phrase was 'prefix delegation.' After I got that, I could search around and get my solution.