interface Ethernet1 ip address 61.54.100.18 255.255.255.0 nat outbound 1 address-group lan
nat server global 61.54.100.22 www inside 192.168.1.1 www tcp nat server global 61.54.100.22 any inside 192.168.1.1 any icmp nat server global 61.54.100.21 ftp inside 192.168.1.2 ftp tcp nat server global 61.54.100.21 any inside 192.168.1.2 any icmp nat server global 61.54.100.20 pop3 inside 192.168.1.3 pop3 tcp nat server global 61.54.100.20 smtp inside 192.168.1.3 smtp tcp quit