HOW TO: Netcomm NB9WMAXX and Firewall

[Dale]

On 15 July 2010 10:40, Basil Chupin <blchupin at iinet.net.au> wrote:
> On 15/07/10 10:13, Callan Jefferson Davies wrote:
>>> My advice: ignore grc.com. :-)
>>>
>>
>> I'll pipe up here and agree with that statement - there's absolutely no
>> need to go blocking pings.
>>
>> I work for an ISP (Adam in Adelaide) and get this question a lot from
>> customers, and also talk to a lot of customers that have gone and
>> blocked pings.
>>
>> Here's a couple of items for consideration :
>>
>>    - people generally want to block pings to be protected against ping
>> "floods"
>>
>>    - blocking pings only stops your router from replying to pings, it
>> doesn't stop someone sending you pings. so a ping flood can still happen.
>>
>>    - these days, if someone wants to discover you on the Internet,
>> they're probably going to port-scan you, not ping you. Once they port
>> scan you, maybe they'll find a (web, mail, ssh etc) server. Then they'll
>> try to exploit that server. If you're not running any servers, no
>> problem. If you are running servers, then blocking pings won't offer any
>> benefit.
>>
>>    - if you're having issues with your Internet connection and you call
>> your ISP, they're probably going to try a ping to see if your connection
>> is online. Blocking pings makes technical support difficult!
>>
>>
>> The above just represents my thoughts, but if anyone reckons I'm wrong
>> about something please do speak up!
>>
>> Cheers
>> Callan
>>
>
> Thank you everybody for the responses. I have been assured.
>
> I shall now ignore grc.com :-) .
>

Basil,

I would not go to the point of ignoring grc.com, just use it as a
guide/reference. If you a really worried get a friend to nmap you

for example:
# nmap -sS -sU -O -p 1-65535 -v -P0 <IP_ADDRESS>
Note that nmap command can take a long time

Regards
Dale
-- 
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"The significant problems we face cannot be solved at the same level
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