ddclient configure to recognize the eth0 and wlan0 at the same time

[lina <lina.lastname@gmail.com>]

Hi,

How to configure ddclient to recognize the eth0 and wlan0 at the same time,

# /etc/ddclient.conf

protocol=dyndns2
#use=web, web=checkip.dyndns.com, web-skip='IP Address'

use=if, if=eth0
#use=if, if=wlan0
server=members.dyndns.org
login=lina
password='827827'


# ddclient restart
WARNING:  unable to determine IP address

so when use the wireless I need comment use=if, if=eth0 and uncomment
use=if, if=wlan0 each time,

I don't know how to make it a bit intelligent.

Thanks with best regards,