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Cisco 800 - Port Forwarding only from one WAN IP

Posted on 2016-08-31
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Last Modified: 2016-09-08
Hi Team

How do I configure on a Cisco router with a port forwarding rule restricted to a specific WAN IP?
Rather than everyone on the internet can RDP, but only coming from one WAN.

Thanks
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Question by:goraek
3 Comments
 
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Expert Comment

by:SIM50
ID: 41777978
I think it is something like below.

external NAT ip - 192.168.1.100
internal IP - 192.168.2.100
-------------------------------
ip access-list extended CLIENT
permit ip host 192.168.1.1 host 192.168.1.100

route-map CLIENT-RMAP permit 10
 match ip address CLIENT

ip nat inside source static 192.168.2.100 3389 192.168.1.100 3389 route-map CLIENT-RMAP

to verify: sh ip nat translations
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Author Comment

by:goraek
ID: 41779243
Thanks but how do I restrict a WAN IP (home) for example? I want 58.58.58.58 (home public IP) to only RDP to the host 192.168.2.100.
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Accepted Solution

by:
Craig Beck earned 2000 total points
ID: 41781583
If you have the security bundle features on the router you can use the firewall, or you can use an ACL on the WAN interface to drop all RDP apart from the specific IP you need.

For example...

ip access-list extended WAN-to-LAN
 permit tcp host 58.58.58.58 host any eq 3389
 deny tcp host any any eq 3389
 permit ip any any
!
int Dialer0  (or whatever your WAN interface is)
 ip access-group WAN-to-LAN in
!

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