Google translate:
Is it possible for adbd to listen on 127.0.0.1 for port forwarding ( for example https://github.com/Magisk-Modules-Repo/ssh ) or add
iptables -A INPUT -p tcp -s 127.0.0.1 --dport ${port adbd} -j ACCEPT
iptables -A INPUT -p tcp -s 0.0.0.0/0 --dport ${port adbd} -j DROP