How to get interface port names?

[cnd.fflv]

Hi there.

Let's say I want to execute in the shell script the following:

/sbin/ifconfig rl0 down

to bring LAN interface down.

But I do not want to use the specific port (i.e. rl0, vr1 etc.) here. Otherwise if I move this script to another pfSense box, I will have to edit it in order to adjust interface port on that box accordingly.

Is there a way to to use variable for this so it will work in any machine? Something like "/sbin/ifconfig <port for="" lan="" interface="">down"?

Thanks…</port>

[stephenw10]

You can almost certainly do this in php, though I never have. If you look into how this is done in pfSense is uses a function something like:
get_real_interface(LAN)#
It's a function in /etc/inc/interfaces.inc

Steve