HWIC-4ESW and NAT

Unanswered Question
Oct 27th, 2008
User Badges:

Hello All,

I have a Cisco 2821, I am looking for some resources to assist my endeavors configuring NAT (inbound to outbound access) on the HWIC-4ESW.

Currently the internal clients cannot access the internet. Here are my interfaces and config:


GigabitEthernet0/0: 77.77.77.77

Description: "Public Interface"

NAT Outside


FastEthernet0/0/0: 10.2.12.1

NAT Inside

VLAN 3


FastEthernet0/0/1: 10.3.12.1

NAT Inside

VLAN 2


ip nat inside source list 7 interface GigabitEthernet0/0 overload


ip nat pool ovrld 77.77.77.77 77.77.77.77 prefix 28


access-list 7 permit 10.2.12.1 0.0.0.100

access-list 7 permit 10.2.13.1 0.0.0.100



I am able to ping the public interface from the inside networks, and when looking into th translation table, nothing is listed there. Am I missing something in the config for the HWIC-4ESW ?

Many Thanks for any insight you can offer,


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Loading.
Jon Marshall Mon, 10/27/2008 - 14:19
User Badges:
  • Super Blue, 32500 points or more
  • Hall of Fame,

    Founding Member

  • Cisco Designated VIP,

    2017 LAN, WAN

What are the subnet masks associated with the clients. Is there any reason why the mask is 0.0.0.100 in your acl 7. Could you explain this bit ?


Also i'm assuming this is not in use


ip nat pool ovrld 77.77.77.77 77.77.77.77 prefix 28


Jon

mcolley Mon, 10/27/2008 - 14:24
User Badges:

The subnet masks on the clients are 255.255.255.0, and no - the IP address of 77.77.77.77 is not in use.

Jon Marshall Mon, 10/27/2008 - 14:25
User Badges:
  • Super Blue, 32500 points or more
  • Hall of Fame,

    Founding Member

  • Cisco Designated VIP,

    2017 LAN, WAN

change


access-list 7 permit 10.2.12.1 0.0.0.100

access-list 7 permit 10.2.13.1 0.0.0.100


to


access-list 7 permit 10.2.12.0 0.0.0.255

access-list 7 permit 10.2.13.0 0.0.0.255


Edit - there is also a typo in either your interface config or your acl - is it 10.2.13.x or 10.3.12.x ?. Just make sure they match.


Jon

Actions

This Discussion