COMMA!? I swear the list of characters and escaped characters I tried was much longer and that must've been the one character I didn't try! I'll stick to the spreadsheet, it's where I store most network-related data (MACs, DNS, domain stuff, DHCP, CPE hardcoded passwds…) anyway, it's perfect — thanks!
I got the copy button below some boxes BTW — which didn't make any sense since I couldn't paste — but now if I assume correctly there'd be a paste button if I copy from another of these fields. It makes sense now. Thanks again.
I was going to reply much earlier without checking first. Thankfully I reconsidered because of the new line bit. I had mentioned double new line earlier because I thought it was well-known a single new line didn't cut it. This made me a little dubious about pasting from a spreadsheet so I tried it, in five six browsers:
(https://i.imgur.com/qtpqY7d.png)
Firefox, Chromium, Chrome, Vivaldi, Edge and Safari
It didn't work. Fortunately, I'm more stubborn and determined than a Schnauzer mini trying to get a toy and I refused to believe I'd been advised wrong so I pasted that in an IDE and made the lines into a single string, pasted it in the first of six browsers peeking behind the IDE — Firefox — and it took it right away, formatted it nicely! So, in the end, it might take a little more work than not, but it's much more preferable than the alternative of entering each value individually.
I have currently 4 or 5 OPNsense firewalls, (none of then work as firewalls BTW, mostly pre- and post-DNS stuff), some of them require the same settings minus one (self), and then again for IPv6, so it's very easy to make mistakes. This is a huge life saver! Thanks!