Update README.md

添加“测试新的IPv6路由防火墙规则”。

Wireguard/README.md

@@ -122,4 +122,8 @@ PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -m state --
 # 原来的IPv6 iptables 防火墙规则
 PostUp   = iptables -A FORWARD -i wg0 -j ACCEPT; iptables -A FORWARD -o wg0 -j ACCEPT; iptables -t nat -A POSTROUTING -o ens3 -j MASQUERADE; ip6tables -A FORWARD -i wg0 -j ACCEPT; ip6tables -A FORWARD -o wg0 -j ACCEPT; ip6tables -t nat -A POSTROUTING -o ens3 -j MASQUERADE
 PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -o wg0 -j ACCEPT; iptables -t nat -D POSTROUTING -o ens3 -j MASQUERADE; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -D FORWARD -o wg0 -j ACCEPT; ip6tables -t nat -D POSTROUTING -o ens3 -j MASQUERADE
+
+# 测试新的IPv6路由防火墙规则
+PostUp   = iptables -I FORWARD -i wg0 -j ACCEPT; iptables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT; ip6tables -I FORWARD -i wg0 -j ACCEPT; ip6tables -I FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
+PostDown = iptables -D FORWARD -i wg0 -j ACCEPT; iptables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT; ip6tables -D FORWARD -i wg0 -j ACCEPT; ip6tables -D FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
 ```