Road Runner Cable Internet Modem Service

Disclaimer: This page is specific to the San Diego system, though most of this information may apply to Road Runner in other cities.

Notice: In July 2004, I disconnected my Road Runner service. I am now using ADSL service from Speakeasy. At $110/month, Speakeasy is more expensive than a Road Runner cable modem or SBC DSL, but it is well worth the extra money. For my money, Speakeasy gives me ADSL at 768 kb/s up and 6000 kb/s down; 4 static IP addresses; no port filtering; no restrictions on running servers, and a reasonably responsive customer support system.

I no longer use Time Warner for cable TV either, as I have DirecTV. I will keep these pages up indefinitely so that they may help others, but I am no longer maintaining them.

Now that Road Runner has eliminated its universally reviled login requirement, it is much easier to set up Linux to use it. You no longer need my rrlogin.c program. All you need to support a single Linux host is a standard DHCP client. I use and recommend  dhclient  from the Internet Software Consortium; it is bundled with the major Linux distributions.

Back when logging into RR was required, I wrote a custom version of the /etc/dhclient-script file that automatically logged in. This is no longer required. The standard script distributed with dhclient should work barring any special local customizations you may need.

Here is a new writeup on using the policy routing mechanism in the Linux 2.2.x kernel to more efficiently evade Road Runner's IP source address ingress filters when you use IP-in-IP tunneling to set up a virtual private network. (23 Dec 1999)

When Road Runner required a login, it used different login protocols in different cities. To help steer people to the right program, I kept a comprehensive list of Road Runner cities with the type of login program used on each. I am no longer keeping it up to date.

Want to know how the Road Runner system is put together? See San Diego Road Runner Architecture, last updated 13 July 1998. This is a bit out of date; blocks of new IP addresses have been added, and the reviled TASes are now being removed.

Road Runner problems, past and present

Setting up RR on Linux/UNIX machines

General stuff on encapsulation, tunneling and masquerading

Many of Road Runner's more severe limitations can be circumvented with packet encapsulation or IP address masquerading. Here are some general resources on these techniques under Linux:

Commentary, editorials, etc

Miscellaneous general stuff on cable modem networks

Here is an excellent  Cable-Modem FAQ with information on setting up Linux with many cable modems, including many networks outside the United States. is a pretty good collection of links with general cable modem resources, including a page of links on Linux with cable modems.

David Smith has set up a web site on the Road Runner network being rolled out in Austin, TX.

On May 10, 1997, Cox/@Home demonstrated their cable modem service to the public. I attended the demonstration and took notes. Here is my report

And here is a web site with cable modem standards information.

Some older pages

Comments, suggestions, corrections and additions are invited.

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Last updated: 12 July 2004