# update-alternatives --set iptables /usr/sbin/iptables-legacy
# update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
# update-alternatives --set arptables /usr/sbin/arptables-legacy
# update-alternatives --set ebtables /usr/sbin/ebtables-legacy
原文：
https://serverfault.com/questions/1025176/debian-10-how-can-i-disable-nftables-and-continue-to-use-iptables-only
