This directory contains unfinishe hacks / inspirations
* firewalling / networking in ucloud
** automatically route a network per VM - /64?
** nft: one chain per VM on each vm host  (?)
*** might have scaling issues?
** firewall rules on each VM host
   - mac filtering:
* To add / block
** TODO arp poisoning
** TODO ndp "poisoning"
** TODO ipv4 dhcp server
*** drop dhcpv4 requests
*** drop dhcpv4 answers