With nw_conf you change the SSID of the Public and Private APs. If you want to change the GatewayID of the wifidog.conf file, you have to do it by hand (in /etc/init.d/nightwing watch the code after the comment "## Set config for WiFiDog").
OK Thanks
If I want to use mac address of router without ":"
Example: mac is 00:13:02:85:24:5e and node_id will be 00130285245e
Can you help me to do it
Helene Gauthier