troubleshooting Question

Cisco Router 881 setup to route my LAN to internet

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JuneaucountyFlag for United States of America asked on
RoutersNetworkingNetwork Architecture
37 Comments1 Solution7200 ViewsLast Modified:
I have a Cisco 881 and i want to route multiple computers to the router to get out to the internet.

My internal (LAN) ip scheme 172.20.X.X
My internet (outside) ip address is 1.1.1.1 (example)

My internal (LAN) network is plugged into FastEthernet 0
My internet (global) outside is plugged into FastEthernet 4

If I setup my computers default gateway to 172.20.0.246, i am not getting out to the internet. What am i doing wrong?

Here is my config:

Building configuration...


! Last configuration change at 16:47:47 UTC Thu Apr 4 2013
! NVRAM config last updated at 21:04:40 UTC Wed Mar 27 2013
! NVRAM config last updated at 21:04:40 UTC Wed Mar 27 2013

no service pad
service timestamps debug datetime msec
service timestamps log datetime msec

!
hostname Roger
!
boot-start-marker
boot-end-marker
!
!
enable secret 5 $1$RH.e$bLnsdf2sdfyQssdfsdfsWsdfsdIsdfsdfAgDUgwatdSbEA.
enable password 7 143D4asdsdffsd15F59sdf077273750107
!
no aaa new-model
no process cpu extended history
no process cpu autoprofile hog
memory-size iomem 10
crypto pki token default removal timeout 0
!
!
no ip source-route
!
!
!
!
!
ip cef
no ipv6 cef
!
!
license udi pid CISCO881-K9 sn FTX1702853P
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0
 switchport access vlan 2
 no ip address
 no cdp enable
!
interface FastEthernet1
 no ip address
 shutdown
 no cdp enable
!
interface FastEthernet2
 no ip address
 shutdown
 no cdp enable
!
interface FastEthernet3
 no ip address
 shutdown
 no cdp enable
!
interface FastEthernet4
 ip address 1.1.1.1 255.255.255.255
 ip nat outside
 ip virtual-reassembly in
 duplex auto
 speed auto
 no cdp enable
!
interface Vlan1
 no ip address
 shutdown
!
interface Vlan2
 ip address 172.20.0.246 255.255.0.0
 ip nat inside
 ip virtual-reassembly in
!
ip forward-protocol nd
no ip http server
no ip http secure-server
!
ip nat inside source list 1 interface FastEthernet4 overload
ip nat inside source static tcp 172.20.0.0 25 1.1.1.1 25 extendable
ip nat inside source static tcp 172.20.0.0 80 1.1.1.1 80 extendable
ip nat inside source static tcp 172.20.0.0 443 1.1.1.1 443 extendable
!
access-list 1 permit 172.20.0.0 0.0.0.255
!
!
!
!
!
line con 0
line aux 0
line vty 0 4
 password 7 132F4446sdfsd5E0F5C727A
 login
 transport input all
!
end
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