I'm currently working with NAT ready for my CCNA next week. I read up on NAT last night but have a few questions.
Lets say you have this scenario.
ip nat outside
ip address 22.214.171.124 255.255.255.252
interface Ethernet 0
ip nat inside
ip address 192.168.1.1 255.255.255.0
ip nat inside source list 50 serial 0/0
access-list 50 permit 192.168.1.0 0.0.0.255
This configuration would only allow one host out at a one time that has an IP address that falls within the permit statement and because I have not overloaded it right?
If somebody on the outside was to ping 126.96.36.199, this would not be translated to an internal address because I haven't created static NAT entry, the packet would be dropped?
Lets say, if I add 'ip nat inside source static 192.168.1.4 20 188.8.131.52' and a host from the outside pinged 184.108.40.206, this would be translated and forwarded to 192.168.0.4 and this would also work vice versa?
Last of all,
If I created a pool of address, let's say from 220.127.116.11 18.104.22.168 255.255.255.248 and I configured the NAT statement with OUT overload, only 7 connections would be able get to the internet right using the pool of addresses, but if I overloaded the NAT statement, each IP address from the pool statement would be able to work with every available port number if needed?