Step by Step instruction to block IP address Cisco 2600

We have a Cisco 2600 router. We need Step by step instruction to keep IP address from going out to the internet.

We want it to only be allowed on our local network

Bob Ross

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Don JohnstonConnect With a Mentor InstructorCommented:
Determine which interface goes out to the internet (serial 0/0, serial 0/1, fastethernet 0, etc)

console or telnet into the router.
enter the following commands. <text> = a variable

password: <enable password>
Router#conf t
Router(config)#access-list 50 deny
Router(config)#access-list 50 permit any
Router(config)#interface <serial 0/0> (or whatever the interface that connects to the internet is)
Router(config-if)#ip access-group 50 out
Router#copy run start

"ip route null0 "
should kill it off.
and step-by-step instructions:
telnet into router
enter password
go into priviledged mode (command: enable)
enter enable password
go into configuration (conf t)
go into your internet interface information (you didnt specify what kind of internet you have and how it's connected)
then type that command i posted earlier w/o the "'s and then exit/exit
then you can do a 'wr mem' to save changes.
bross073097Author Commented:
Thanks. It all entered in with out a return of any errors.

I will be able to test later.

Thank you so much.

bross073097Author Commented:
donjohnston, please contact me off list if your interested. I have a full router configure in a couple weeks or less when we switch providers.

The router has not been touched much in the last 5 years.

Bob Ross
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