Honestly firewall-config does a pretty decent job with the firewalling part of things, if you don’t need anything too complicated. It’s not web based, but can be run over ssh without too much of an install footprint.
I think the way to go here would actually be to integrate some plugins with cockpit-project, which already has some of what you’d need.
Shoo…
On one hand, that one looks pretty clean, all things considered (no pictures of underbody to show possible leaks). At the same time… man that’s a lot of money to spend on a car that frankly is a PITA to drive in town. I have an '81 Targa, and I’d sell mine for … maybe not half that, but definitely less than that. I also have an '86 951 that’s been tastefully upgraded with more modern performance mods (e.g. rebuilt turbo, new pistons, mass airflow sensor, sleeved cylinders, etc) that I might consider selling for half of that price - and trust me an '86 951 is way easier to live with and more fun to drive than a base '86 911.
I mean… $87k is easy 991 money these days. Yes, a 991 isn’t a classic, but there’s a lot you have to put up with on these older cars. I would not call $87k for an '86 3.2 a “good deal”. For reference, right now Hagerty considers a #2 to be an $85k car, and a #3 to be a $50k car. A 90,000 mile #2 car is… not a thing. “Could win a regional car show, drives like new.” 4 Owners, no mention of previous work or service history. This is very likely #2 money for a #3 car, and I wouldn’t pay it.
If it had a full service history (with receipts), a clean PPI and the paint was immaculate, I *might* consider going $80k for it. But absent any of those things I think $60-65 is probably more realistic.