Changing subnet mask
I would like to change the netmask on my lan interface. Do I have to reconfigure my lan interface from the terminal or can I use the ifconfig netmask command.?
You can use the "Set interface(s) IP address" option to change it, or using the GUI (Interfaces > LAN)
Using ifconfig would only work temporarily. Next time the system refreshed the interface or the firewall rebooted, it would go back to the setting in your config.xml