Re: [gentoo-user] Automatic host switching

[Robert Bridge]

On Sun, 21 Sep 2008 19:19:46 +0200
Momesso Andrea <momesso.andrea@×××××.com> wrote:

> On Sunday 21 September 2008 18:47:24 Robert Bridge wrote:
> > On Sun, 21 Sep 2008 15:08:18 +0200
> >
> > Momesso Andrea <momesso.andrea@×××××.com> wrote:
> > > My home server is 192.168.1.5 in my home wan, the hostname of the
> > > machine is "fandango", and the the /etc/hosts in my laptop looks
> > > like this:
> > >
> > > [...]
> > > 192.168.1.5             fandango
> > >
> > > Sometimes I need to connect to the server while I'm far from
> > > home, so the server has also a dyndns address, let's say
> > > "fandango.dyndns.org".
> > >
> > > When I connect from outside my wan I use "fandango.dyndns.org",
> > > when I'm at home just "fandango".
> > >
> > > Is there a way to tell my laptop to always use "fandango" and,
> > > if "192.168.1.5" is available, to resolve it this way, otherwise
> > > to resolve it as "fandango.dyndns.org".
> > >
> > > This way I will avoid double configurations, double password
> > > stored in firefox, ecc...
> > >
> > > Any ideas?
> >
> > Well, when I used to switch my laptop between college (college
> > didn't use DHCP!) and home networks, I was reduced to a script to
> > switch configs for eth0...
> >
> > It sounds like all you need to do is swap out the hosts file
> > depending on which network you are on, this shouldn't be
> > difficult...
>
> Like having a /etc/hosts.home and a /etc/hosts.world and a script
> that sysmlinks them to /etc/hosts depending on the fact that i can
> ping or not 192.168.1.5?

Basically, I would probably look at methods of hooking it onto the IP
assigned to the device (ifplugd should be able to do this), but that is
the basic idea.