[colug-432] Ubuntu as a router?

[Joseph Fannin]

On Wed, Sep 30, 2009 at 06:37:56PM -0400, richard hornsby wrote:

> Is there a good/recommended guide for setting up Ubuntu as a router?
> I basically followed this https://help.ubuntu.com/community/Router

Everything there applies equally to Debian.  I've been using a setup
not unlike this on Debian and now Ubuntu for some years.

> For some reason trying to run Ubuntu as a router is acting all sorts
> of weird - interfaces that are configured static are trying to get
> DHCP addresses, /etc/resolv.conf getting bad information, etc.  and it
> was so messed up I switched back to using my DSL modem.

This sounds like NetworkManager doing stupid things.  You can count on
that for anything but trivial networking setups.

If network-manager is installed, can you remove it?  If you can't
remove it, making sure that /etc/NetworkManager/nm-system-settings.conf
has ifupdown= set to 'false' might convince N-M to keep its hands off.

Disclaimer:  I'm running Karmic, having skipped Jaunty, so I don't
really know the particulars of how N-M is set up in that version.

--
Joseph Fannin
jfannin at gmail.com