interface GigabitEthernet0/0
 ip address 192.168.50.1 255.255.255.0
 ip nat inside

interface GigabitEthernet0/1
 ip address dhcp
 ip nat outside
ip nat inside source list 1 interface GigabitEthernet0/1 overload
access-list 1 permit any

DNS: puerta de enlace y