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Could the Cisco router do return NAT?

My configuration looks like:

interface GigabitEthernet0/0
 description External
 ip address x.223.40.119 255.255.255.0
 ip nat enable
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description Internal
 ip address x.100.1.253 255.255.255.0
 ip nat enable
 duplex auto
 speed auto
!
ip nat source static x.100.1.202 x.223.40.154
ip nat source static x.100.1.204 x.223.40.155

The x.100.1.202 can't ping & rdp to x.223.40.155. How should I do?

9 Replies 9

omz
Collaborator
Collaborator

Hi 

Under the interface config you need - ip nat inside / ip nat outside command on the appropriate interface. 

See example - 

https://www.cisco.com/c/en/us/support/docs/ip/network-address-translation-nat/13773-2.html

 

 

My configuration now looks like:

interface GigabitEthernet0/0
 description External
 ip address x.223.40.119 255.255.255.0
 ip nat outside
 duplex auto
 speed auto
!
interface GigabitEthernet0/1
 description Internal
 ip address x.100.1.253 255.255.255.0
 ip nat inside
 duplex auto
 speed auto
!
ip nat inside source static x.100.1.202 x.223.40.154
ip nat inside source static x.100.1.204 x.223.40.155

The x.100.1.202 can ping but can't rdp to x.223.40.155.

I tried to add more 2 commands:

ip nat outside source static x.223.40.154 x.100.1.202
ip nat outside source static x.223.40.155 x.100.1.204

The x.100.1.202 can't ping & rdp to x.223.40.155. How should I do?

 

Thank you very much.

paul driver
VIP Expert VIP Expert
VIP Expert