Connection Cisco 1841 to ISP (Timewarner)

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I have a 1841 router with 2 fast ethernet ports.  I have 1 port connected to a lan switch.  I would like port 2 to be connected to Timewarner cable for internet.  Port 2 is is configured with a static IP I got from the ISP. I also configure DNS on the router.  The problem that I am having is I can't ping the ISP's gateway.  Could some help me?

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Jon Marshall Wed, 09/22/2010 - 15:02

Can you -

1) post config of router

2) post "sh ip int brief" from router

Jon

Current configuration : 1065 bytes

!

version 12.4

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname office

!

boot-start-marker

boot system flash

boot-end-marker

!

enable secret 5 $1$cU.D$bi3DAS9WRrDfxBWbTjDf50

!

no aaa new-model

ip cef

!

!

!

!

ip name-server 66.75.164.89

ip name-server 8.8.8.8

multilink bundle-name authenticated

!

!

archive

log config

  hidekeys

!

!

!

!

!

interface FastEthernet0/0

ip address 10.10.20.1 255.255.255.0

ip nat inside

ip virtual-reassembly

duplex auto

speed auto

!

interface FastEthernet0/1

description $ETH-WAN$

ip address 67.52.116.114 255.255.255.248

ip nat outside

ip virtual-reassembly

duplex auto

speed auto

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 67.52.116.113 permanent

!

!

ip http server

ip nat inside source list 1 interface FastEthernet0/1 overload

!

access-list 1 remark SDM_ACL Category=2

access-list 1 permit 10.10.20.0 0.0.0.255

!

!

control-plane

!

!

line con 0

login

line aux 0

line vty 0 4

login

!

scheduler allocate 20000 1000

end

Interface                  IP-Address      OK? Method Status                Protocol

FastEthernet0/0            10.10.20.1      YES NVRAM  up                    up

FastEthernet0/1            67.52.116.114   YES manual up                    up

NVI0                       10.10.20.1      YES unset  up                    up

Jon Marshall Thu, 09/23/2010 - 03:05

Mark

Can you just confirm, when you say you can't ping the ISP gateway do you mean from the router or from clients or from both ?

If the clients can you change the access-list from -

access-list 1 permit 10.10.20.0 0.0.0.255

to

access-list 101 permit ip 10.10.20.0 0.0.0.255 any

and then update your NAT statement to be -

ip nat inside source list 101 interface FastEthernet0/1 overload

As an aside, when you post config details on this forum if there are public addresses best not to reveal them ie people usually post -

x.x.x.113 rather than the full address you have posted. My fault for not mentioning it.

Jon

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