Hi, I’m helping a hospital in Buenos Aires that has lost their IPv4 due to their ISP moving to CGNAT, putting their on prem imaging servers offline for 7 days. (it’s ok for us though, we have a backup failover isp)

Might have to do something horrible like:

- setup an ipv4 tunnel, which will require hacking a VPN to allow TCP listening, and routing connections to some external proxy with a dedicated static ipv4 address

- or do some modem router level nat port forwarding, and use a ddns to avoid ip changes breaking stuff. but that won’t work probably since public ip is shared

will investigate the isp to see if they are truly short in ipv4 or if they are just moving clients off them in order to sell them to higher bidders and plans, which is likely since I’ve been upsold into optic fiber, static ip surcharge, sd-wan, dedicated connection so far

if you have any advice or RIR contacts (or an ipv4 block to donate, invest or sell), I’d be thankful, my email is in my profile