HOW TO: Netcomm NB9WMAXX and Firewall

[Basil Chupin]

In the very early hours of this morning (Wednesday) we had here in 
Canberra one hell of a wind 'storm' with the result that one of our 
neighbour' trees was bought down and short-circuited 2 phases of the 
power lines. The power surge took out my modem's power unit.

Today, as replacement, I bought the Netcomm NB9WMAXX (ADSL2+VoIP) 
modem/router and now have it working for both ADSL and VoIP.

However, for the first time in ~7 years I now FAIL the ShieldsUp!, 
TruStealth, test on grc.com: all ports are in Stealth mode but the 
FAILure occurs because the Netcomm accepts and replies to ICMP pings. 
This didn't occur on the Netgear and the Zyxel modems I had before.

The question now is: does anyone know which parameter in this Netcomm I 
need to play with - and what are the settings - to stop these responses 
to pings, please?

As additional info, I am running Ubuntu Lucid (is there something in 
Lucid which could be set? - although I have never had to fiddle with any 
settings in Ubuntu before so I believe that this is modem firewall 
hassle, but then I am not a network geek :-) ).

Any advise would be greatly appreciated.

BC

-- 
And God created Woman; and to repent He then created Beer.

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