Mother's localhost admin presents.

This is set of crutches for automatically controlling two or more ISPs on multihomed debian-based server. (The original system - devuan ascii.)

• Loads nftables on start first of lan-interfaces.
• On dhcp renew/bound (re)creates route table for each wan-interface.
• Creates and updates list of ip-addresses for ping.
• Pings periodically (cron) or on dhcp event and makes a list of available wan-interfaces.
• Sets default route to first available wan-interface.
• Makes disgusting beeps when switching routes and even more disgusting beeps when inet is not available.

Scripts are written in bash, require iproute2, nftables and dhclient.

Copyleft by dimbor [email protected] 2020 based on https://habr.com/ru/post/199478/