DCFW-1800DCFW-1800•––––NAT••••••VPN•192.168.1.1Internet192.168.1.2192.168.1.254202.101.1.254202.101.1.25310.1.1.2[[]][[]]1800E1800E[[]]1800E1800Eipip[[]]ipip1800s1800sadsladsldhcpdhcp[[]]1800s1800sipipipip[[]]NATNAT192.168.1.1Internet192.168.1.2192.168.1.254LANIP192.168.1.1192.168.1.2192.168.1.254202.101.1.254202.101.1.253