[clug] Network "profiles" and locations

Sam Couter sam at couter.id.au
Sun Aug 21 16:19:17 MDT 2011

Adam Baxter <voltagex at voltagex.org> wrote:
> Is anyone doing "location aware" network configuration?

I do, to determine which OpenVPN configuration should be started.

> I'm thinking of the following:
> * Laptop has been assigned an IP in the range, I must be
> at home. Otherwise I'm out, change/disable my /etc/apt/sources.list to
> not use my local mirror
> * Laptop has been assigned a public IP via ppp0, I'm on GPRS, disable
> all chatty services to conserve bandwidth
> * Laptop has been assigned an IP in the range, I'm at
> work, change my homepage
> ...and so on.
> I think Network Manager does some of this, but I'm thinking about
> doing it via ifup/down.

ifup/ifdown will run scripts in several directories in /etc/network. The
most interesting directories are if-up.d and if-post-down.d to take action
after the interface is up or down.

The scripts have access to the interface configuration in
/etc/network/interfaces through environment variables. man interfaces for
all the details.
Sam Couter         |  mailto:sam at couter.id.au
OpenPGP fingerprint:  A46B 9BB5 3148 7BEA 1F05  5BD5 8530 03AE DE89 C75C
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