source: http://www.securityfocus.com/bid/12901/info

Netcomm NB1300 Modem/Router is reported prone to a remote denial of service vulnerability.

An attacker can exploit this condition by sending a large amount of ping requests to the device.

A successful attack can deny service to legitimate users. 

Send four consecutive requests of
ping -l 65500 -w 0 -t <IP of DSL Modem> 