Lets come to conculsion first earlier than answering your query about vacation spot NAT
Vacation spot NAT is all the time inbound site visitors . When outdoors community customers needs to entry inside community sources it is (outdoors to inside)
Instance : Assuming you will have hosted a software in your inside community and the requirement is needs to entry software from web on this case we are going to configure vacation spot NAT with public ip offered by ip with software hosted server non-public ip command in cisco ISR router is as beneath
IP nat inside supply static 10.0.0.3 132.16.18.1
Customers from web will provoke site visitors with vacation spot ip 132.16.18.1 . Site visitors will hits ISR router and it is translated packet ip header to non-public ip and enters into inside networks and entry the applying and responce will fallow similar path ..
As you acknowledged in your query any packet intiàted going from inside to outdoors => is all the time thought-about as souce NAT command is as fallow
IP nat inside souce static “non-public ip “public ip”
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IP NAT inside supply vs IP NAT outdoors supply
Lesson Contents
Configuration
IP NAT inside supply
IP NAT outdoors supply
On Cisco IOS routers we will use the ip nat inside sourceand ip nat outdoors supply instructions. Most of us are accustomed to the ip nat inside supply command as a result of we frequently use it to translate non-public IP addressses on our LAN to a public IP handle we obtained from our ISP.
What in regards to the ip nat outdoors supply command? Does it work in the identical approach as ip nat inside supply?
That is the distinction between the 2 instructions:
ip nat inside supply:
Interprets the supply IP handle of packets that forwards from inside to outdoors.
Interprets the vacation spot IP handle of packets that
Forwards from outdoors to inside.
ip nat outdoors supply:
Interprets the supply IP handle of packets that ahead s from outdoors to inside.
Interprets the vacation spot IP handle of packets that journey from inside to outdoors