Firewall-1 3.0 and 4.0 leaks packets with private IP address information, which could allow remote attackers to determine the real IP address of the host that is making the connection.
From 神龙GPT (AIGC)
防火墙-1 3.0 和 4.0 泄露了带有私有 IP 地址信息的 packets，这可能导致远程攻击者确定正在连接的主机的真实 IP 地址。