ip6tables-translate -t nat -A POSTROUTING -j MASQUERADE
nft 'add rule ip6 nat POSTROUTING counter masquerade'

ip6tables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10
nft 'add rule ip6 nat POSTROUTING meta l4proto tcp counter masquerade to :10'

ip6tables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --to-ports 10-20 --random
nft 'add rule ip6 nat POSTROUTING meta l4proto tcp counter masquerade to :10-20 random'

ip6tables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --random
nft 'add rule ip6 nat POSTROUTING meta l4proto tcp counter masquerade random'

ip6tables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --random-fully
nft 'add rule ip6 nat POSTROUTING meta l4proto tcp counter masquerade fully-random'

ip6tables-translate -t nat -A POSTROUTING -p tcp -j MASQUERADE --random --random-fully
nft 'add rule ip6 nat POSTROUTING meta l4proto tcp counter masquerade random,fully-random'