troubleshooting Question

Cisco Router - redirect all customer traffic to specific IP and Port ( eg. www and domain )

Avatar of jrhue
jrhue asked on
1 Comment1 Solution451 ViewsLast Modified:
When a customer has not paid or thier service has been disabled for any reason, we send them to a web page with our name and phone number and a message to call us.
With customers where we have a linux based firewall, I simply use the following iptables commands
#### let thru all dns traffic.  DNAT all www traffic to one IP address (blocked service screen )
#### block all other traffic from the customer's subnet
#### customers interface is eth1 --- the public facing interface is eth0
#iptables -t nat -A PREROUTING -i eth1 -p udp --dport domain -j ACCEPT
#iptables -t nat -A PREROUTING -i eth1 -p tcp --dport www -j DNAT --to
#iptables -t nat -A PREROUTING -s -j DROP

We have many customers with just Cisco 1600/1720/2500 routers and no firewall.

How do I do the same redirection with a standard cisco router?  

They are all running IOS 11 or higher.

Our community of experts have been thoroughly vetted for their expertise and industry experience.

Log in to continue reading
Become an EE member today7-DAY FREE TRIAL
Members can start a 7-Day Free trial then enjoy unlimited access to the platform for $9.99/mo
View membership options
Unlock 1 Answer and 1 Comment.
Learn why we charge membership fees
We get it - no one likes a content blocker. Take one extra minute and find out why we block content.
See how we're fighting big data
The Value of Experts Exchange in My Daily IT Life

Experts Exchange (EE) has become my company's go-to resource to get answers. I've used EE to make decisions, solve problems and even save customers. OutagesIO has been a challenging project and... Keep reading >>


Owner of Outages.IO
Phoenix, Arizona, United States
Member Since 2016
Join a full scale community that combines the best parts of other tools into one platform.
Unlock 1 Answer and 1 Comment.
View membership options
“All of life is about relationships, and EE has made a virtual community a real community. It lifts everyone's boat.”
William Peck

Member since 2004