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NAT pool using different subnet than interface address

Hello Everyone,

I have a Cisco ASA wherein I have configured 5 interfaces consisting of inside, outside, dmz1, dmz2 and vpn. When we are natting interfaces from the internal networks to outside, can we use a subnet that is different from the interface subnet? For example the outside interface address is 192.168.10.1/24, can we use nat pool with another subnet such as 172.16.10.0/24? My understanding would be to add routes to allow traffic to use the subnet.

Thanks

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Accepted Solutions
Hall of Fame Super Blue

Re: NAT pool using different subnet than interface address

sidcracker wrote:

Hello Everyone,

I have a Cisco ASA wherein I have configured 5 interfaces consisting of inside, outside, dmz1, dmz2 and vpn. When we are natting interfaces from the internal networks to outside, can we use a subnet that is different from the interface subnet? For example the outside interface address is 192.168.10.1/24, can we use nat pool with another subnet such as 172.16.10.0/24? My understanding would be to add routes to allow traffic to use the subnet.

Thanks

Yes, you can use any subnet you want as long as that subnet is routed back to the outside interface of your ASA.

Jon

2 REPLIES
Hall of Fame Super Blue

Re: NAT pool using different subnet than interface address

sidcracker wrote:

Hello Everyone,

I have a Cisco ASA wherein I have configured 5 interfaces consisting of inside, outside, dmz1, dmz2 and vpn. When we are natting interfaces from the internal networks to outside, can we use a subnet that is different from the interface subnet? For example the outside interface address is 192.168.10.1/24, can we use nat pool with another subnet such as 172.16.10.0/24? My understanding would be to add routes to allow traffic to use the subnet.

Thanks

Yes, you can use any subnet you want as long as that subnet is routed back to the outside interface of your ASA.

Jon

Cisco Employee

Re: NAT pool using different subnet than interface address

Hi Brenda,

See Jon's answer above your post. He answered the previous poster that this can be done.

-Mike

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