Gobo

From a networking standpoint, you can configure qos tagging for a specific application and use that dscp variable as a flag for pbr. Then set your next hop via respective tunnel.

Setup nginx as a v6 to v4 reverse proxy. Or the inverse if you have a public v4 in a vpc to use as a dmz.

/usr/lib or /usr/lib64 or /lib (some distros) or /lib64

Some things (like hosts file) are in /etc. /etc mostly contains configs.

It’s github. Submit a PR