CCNA ICND1 Lab5 – PAT Application


Lab Tips:

Both static NAT and dynamic NAT can only implement one-to-one address translation, but can implement one-to-many address translation. A router performs the function and translates different private IP addresses to the same public IP addresses. Connections are differentiated based on the source port number.


Lab Requirements:

1. Enable all PCs on network to use a single public IP address by using PAT.

2. A PC on the public network accesses any port of Direct the connection to server by using PAT and complete all mapping services.

3. A PC on the public network accesses port 80 of Direct the connection to server Map only the HTTP service of port 80.


1. A 2600 series router is used as an edge router.

2. The public IP address is

Lab Process:

P4S-R(config)#interface fastethernet 0/0

P4S-R(config-if)#ip address

P4S-R(config-if)#ip nat inside            / Set f0/0 to the inside interface

P4S-R(config-if)#no shutdown


P4S-R(config)#ip route         / Set the static route directed to the external network

P4S-R(config)#interface S1/0

P4S-R(config-if)#ip address

P4S-R(config-if)#ip nat outside      / Set S0/0 to the outside interface

P4S-R(config-if)#no shutdown


P4S-R(config)#access-list 1 permit      / Create a standard access list

P4S-R(config)#ip nat pool router netmask   / Create an address pool

P4S-R(config)#ip nat inside source list 1 pool router overload

P4S-R(config)#ip nat inside source static extendable

P4S-R(config)#ip nat inside source static tcp 80 80

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