始终记住一个问题 Unknown Source IP 192.168.1.1 →X Source IP Source Port Destination IP Destination Port 192.168.1.1 1056 172.16.1.1 80 XDestination IP 10.1.1.1 does not exist Source IP Source Port Destination IP Destination Port 172.16.1.1 80 10.1.1.1 1056 Node B 172.16.1.1 Local Network A Internet Local Network B 10.1.1.0/24 172.16.0.0/24 Node A 192.168.1.1 Local Network C 192.168.1.0/24 始终记住一个问题