Keeping AWS bills low with a cheap NAT instance on Amazon Linux 2023

I love a good cloud infrastructure bargain. For a long time, my go-to was the fantastic (and cheap!) int128 NAT module to handle routing without paying the dreaded AWS Managed NAT Gateway premium. But as it with tech, things inevitably break. When I tried pairing the module with newer AMIs, it started causing some issues, specifically, it flat-out refused to reboot on failure. I went digging and…