系統環境爲 Arch Linux，開啓前已經把 iptables 和 ip6tables 規則清空。
報錯如下：
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
RTNETLINK answers: No such file or directory
Error: ipv4: FIB table does not exist.
Flush terminated
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
iptables: Bad rule (does a matching rule exist in that chain?).
ip6tables: Bad rule (does a matching rule exist in that chain?).
ip6tables: Bad rule (does a matching rule exist in that chain?).