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NAT external to internal

Answered Question
Aug 9th, 2006
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i am having trouble with NAT. it is my first try at this and need some help, please. I have a 2610 with 2 Fastethernet connections. fa1/0 is internal 10.10.10.1/24

fa0/0 is external 66.73.xx.xx/26

i can succsefully go internal out to external with the ip nat inside source list 1 int fa0/0 overload command.

what is the command to allow external to internal. thanks

Correct Answer by mmeiers about 11 years 1 week ago

ip nat inside source static 10.10.10.10 66.73.xx.xx will give you a full translation bi-directional

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mmeiers Wed, 08/09/2006 - 11:15
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What is an example of what you are trying to do? Send traffic to a web server or something?

mmeiers Wed, 08/09/2006 - 11:37
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I think these should help depending on your exact scenario.


Static NAT


ip nat inside source {static {esp local-ip interface type number | local-ip global-ip}} [extendable | mapping-id map-id | no-alias | no-payload | redundancy group-name | route-map | vrf name]


no ip nat inside source {static {esp local-ip interface type number | local-ip global-ip}} [extendable | mapping-id map-id | no-alias | no-payload | redundancy group-name | route-map | vrf name]


Port Static NAT


ip nat inside source {static {tcp | udp {local-ip local-port global-ip global-port | interface global-port}} [extendable | mapping-id map-id | no-alias | no-payload | redundancy group-name | route-map | vrf name]


no ip nat inside source {static {tcp | udp {local-ip local-port global-ip global-port | interface global-port}} [extendable | mapping-id map-id | no-alias | no-payload | redundancy group-name | route-map | vrf name]


Here is the link to the doc for NAT for more details on NAT


http://www.cisco.com/univercd/cc/td/doc/product/software/ios124/124cr/hiad_r/adr_i2h.htm#wp1178184

geoffalbin Wed, 08/09/2006 - 12:05
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i wish i could say this is helping, however, it is not. i guess i just need a way to NAT 66.73.xx.xx into 10.10.10.10

Correct Answer
mmeiers Wed, 08/09/2006 - 12:26
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ip nat inside source static 10.10.10.10 66.73.xx.xx will give you a full translation bi-directional

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