The situation:
Router A (ip 192.168.16.1) is the default gateway for the entire company
Anybody in the company is able to go on the internet and ping 8.8.8.8 (google DNS) from there PC
I myself from my laptop have IP 192.168.16.170 and i can ping 8.8.8.8 my default gw is 192.168.16.1
I configured a lab with Router B a 1841 router with NAT
On Router B FastEth 0/0 is facing Router A
On Router B FastEth 0/1 is facing my lab
The problem:
From Router B, both interfaces can ping 192.168.16.1 (Router A, the default gateway)
From Router B i am unable to ping 8.8.8.8 or any other adress outside the 192.168.16.0 network
I dont undersand how i am able to ping my default gateway yet not be able to ping outside my network.
Keep in mind it works from my laptop or any other PC in the building.
Thank you for the insight
**********************************************************************************
Router#sh ip int br
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 192.168.16.137 YES DHCP up up
FastEthernet0/1 192.168.55.11 YES manual up up
NVI0 unassigned NO unset up up
Router#
***********************************************************************************
Router#sh run
Building configuration...
Current configuration : 712 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Router
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
ip cef
!
!
!
!
!
!
!
--More--
!
interface FastEthernet0/0
ip address dhcp
ip nat outside
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.55.11 255.255.255.0
ip nat inside
duplex auto
speed auto
!
ip forward-protocol nd
ip route 0.0.0.0 0.0.0.0 FastEthernet0/0
!
no ip http server
ip nat inside source static 192.168.55.170 192.168.16.10
ip nat inside source static 192.168.55.11 192.168.16.11
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
login
!
scheduler allocate 20000 1000
end
Router#
*************************************************************************
Router#sh ver
Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(17a), RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 07-Nov-07 11:21 by prod_rel_team
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
Router uptime is 4 hours, 34 minutes
System returned to ROM by power-on
System image file is "flash:c1841-ipbase-mz.124-17a.bin"
Cisco 1841 (revision 7.0) with 114688K/16384K bytes of memory.
Processor board ID FTX1153W03K
2 FastEthernet interfaces
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
31360K bytes of ATA CompactFlash (Read/Write)
Configuration register is 0x2142
Router#
***********************************************************************
Router#ping 192.168.16.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.16.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
*******************************************************************
Router#ping 8.8.8.8
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
