Cisco 877 Series Router as Home Gateway

Recently we completed a job for a residential customer who used a Cisco 877 Series Router as their Internet Gateway device. The device had functioned perfectly well until their ISP changed their username and password. As it’s a bit complicated for a home user to simply update the username and password of their modem they required an IT guy. To complicate matters the modem wasn’t allowing communication via it’s console port and the customer wasn’t aware of it’s password(s).

Cisco 800 Series

We resolved the issue after taking the modem offsite to reload a new config file for ADSL PPPoA to authenticate and route the LAN to the WAN when required.

Note – You only need to reset the modem if you do not know the telnet username and password which by default is ‘cisco’ and ‘cisco’.

Resetting the Modem – If required reset the modem to default by turning it off and holding a pointy object into the reset button for about a minute as it’s turning on, remove the object and the modem should continue to load with it’s default config.

Making the Connection – Use PuTTY to make a telnet connection to your modem which should be your gateway or if working with a freshly reset Cisco 877 series router you need to connect to

Login with cisco and cisco.

Loading the Config – Once logged in type, ‘config t’ and then press enter.

Download our Config file for setting up a PPPoA connection, a modified version of Dave Heavy Industries Cisco 877 config file for TPG (an Australian ISP).

Download the config file.

Once you’ve downloaded the Config file edit the parts delimited by the ****asterisk****.

You’ll need to edit at a minimun the domain-name, ppp chap hostname and password. If you’re more familiar with Cisco IOS by all means edit the network specifics.

Once all edited copy all the file and paste into putty.

Once those commands have processed try pinging and perhaps to confirm your ADSL connection is now active.

You’ll need to make sure the CD light and the PPP light is green.

Saving the new Config – Finally type, ‘copy running-config startup-config’ and confirm by pressing enter in the terminal connection started with PuTTY earlier. This will replace the startup config with the now running new config. Lastly type, ‘write memory’.

Confirmation – To confirm all is working restart your modem and confirm your ADSL connects automatically on startup.

Cisco 800 Series