3640 router version 12.3
We have most of our machines on a class C network. We have a DMZ setup with static NAT addresses. We are running low on the class C network IP addresses so would like to transition to NAT overload (PAT).
The commands I am using are:
ip nat pool ptinat 18.104.22.168 22.214.171.124 netmask 255.255.255.0
ip nat inside source list 20 pool ptinat overload
access-list 20 permit 172.28.0.0 0.0.255.255
I also put the following on the interface FastEthernet0/0
ip address 126.96.36.199 255.255.255.0 secondary
Once I have done this the 188.8.131.52 and the 172.28.0.0 networks cannot talk to each other.