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$ curl repovive.com/roadmaps/network-design/nat-and-pat/nat-configuration-example

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$ curl repovive.com/roadmaps/network-design/nat-and-pat/nat-configuration-example

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NAT Configuration Example - NAT and PAT | Network Design | Repovive

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Network Design26 sections · 911 units44h total

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NAT Configuration Example

Cisco router setup

Here's PAT configuration on a Cisco router:

Define interfaces:

interface GigabitEthernet0/0
  ip address 192.168.1.1 255.255.255.0
  ip nat inside

interface GigabitEthernet0/1
  ip address 203.0.113.5 255.255.255.0
  ip nat outside

Create access list:

access-list 1 permit 192.168.1.0 0.0.0.255

Configure PAT:

ip nat inside source list 1 interface GigabitEthernet0/1 overload

The "overload" keyword enables PAT (port address translation).