Home | Recovery | Cisco How To Net How To | Blog | Search | Forums | Services | Setup Guide | Chicagotech MVP | IT Exam Practice  |  About Us | Contact Us|

Chicago Area Laptop for rent: $35 per day plus $10 for additional day
rental

 

Case Study - Routing Issue

Situation: There are two routers in the main office. XO router 192.168.0.250 connecting to the Internet. Cisco 1841 Router 192.168.0.81 connecting to the remote office. All computer use 192.168.0.81 as default gateway so that they can talk to the Internet and remote office. After added a Cisco ASA5510 between the XO router and the LAN, no one can access the Internet any more.

Troubleshooting: 1. If we setup the default gateway pointing to the ASA5510 192.168.0.250, the computer can access the Internet, but not the remote office. So, the ASA5510 is connecting to the Internet but not route back to the remote office.

2. To resend a packet through an interface to another interface, use the ip redirects interface configuration command.

There are the following command lines in the 1841 Router need to be modified:

interface FastEthernet0/1

 ip address 192.168.0.81 255.255.255.0

 ip access-group sdm_fastethernet0/1_in in

 no ip redirects

no ip unreachables

 no ip proxy-arp

 ip nat outside

 ip route-cache flow

 duplex auto

 speed auto

 no mop enabled

After deleted these two lines: ip access-group sdm_fastethernet0/1_in in and  no ip redirects, all computers are able to access both remote office and internet.

After the changes, the configuration looks like this:

interface FastEthernet0/1
ip address 192.168.0.81 255.255.255.0
no ip unreachables
no ip proxy-arp
ip nat outside
ip route-cache flow
duplex auto
speed auto
no mop enabled

Related Topics

Cisco Password Recovery
Cisco VPN Articles
Cisco VPN Client FAQs
Can’t load Cisco SDM
Cisco Issues and How to
PIX Security Applications
PIX Command Reference

Cisco pix commands and examples

Cisco PIX Firewall Command Reference, Version 6.3 - Index [Cisco PIX Firewall ... Cisco PIX Firewall and VPN Configuration Guide, Version 6.3 - Getting ...
www.howtonetworking.com/cisco/pixcommand1.htm

Cisco PIX security application

Upgrading Software for the Cisco Secure PIX Firewall and PIX Device Manager [Cisco PIX 500 ... Cisco PIX 500 Series Security Appliances Troubleshooting ...
www.howtonetworking.com/cisco/pixapps1.htm
 

Cisco router firewall

Can't access the VPN client in the LAN after establishing Cisco VPN client ... How to forward port to private IP on Cisco Router 831 ...
www.chicagotech.net/ciscorouter.htm

Cisco VPN client errors

Cisco VPN Client Errors. Secure VPN Connection terminated by peer ... Symptom: when using Cisco VPN client to establish a VPN you may receive this message: ...
www.chicagotech.net/ciscoclienterrors.htm
 

Bob Lin Photography services

Real Estate Photography services 

 

  This web is provided "AS IS" with no warranties.
Copyright © 2002-2018 ChicagoTech.net, All rights reserved. Unauthorized reproduction forbidden.