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NAT and PAT configuration examples

July 8th, 2009

Another aide-memoir

NAT and PAT

NAT Static
rtA(config)#ip nat inside source static [Inside local IP address] [Inside global IP address]

rtA(config)#in e0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat inside

rtA(config)#in s0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat outside

NAT Dynamic
rtA(config)#ip nat pool [pool name] [address range] netmask [network address mask]
rtA(config)#ip nat inside source list [list #] pool [name of nat-pool]

rtA(config)#in e0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat inside

rtA(config)#in s0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat outside

rtA(config)#access-list [same list # used above] permit [ip address] [wildcard mask]

PAT
rtA(config)#in e0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat inside

rtA(config)#in s0/0
rtA(config-if)#ip address [ip address] [subnet mask]
rtA(config-if)#ip nat outside

rtA(config)#ip nat inside source list [list #] interface s0/0 overload

rtA(config)#access-list [list #] permit [network address] [subnet mask]
rtA(config)#access-list [list #] permit [network address] [subnet mask]

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