Security / networking guys - how full of shit is GRC?

loop

Veteran XX
On their shields-up testing, they have a portion called "unsolicited packets" which they define as
Unsolicited Packets: PASSED — No Internet packets of any sort were received from your system as a side-effect of our attempts to elicit some response from any of the ports listed above. Some questionable personal security systems expose their users by attempting to "counter-probe the prober", thus revealing themselves. But your system remained wisely silent. (Except for the fact that not all of its ports are completely stealthed as shown below.)

What "questionable" systems counterprobe? Wtf is he talking about? I mean, I've never heard of an IDS/IPS doing that....
 
i used to run blackice back in the day. There was an exploit that would corrupt your data if somebody sent you a malformed packet

:(
 
True but if you were cool you had to run it.

I guess I was cool for 24 hours. Was so sick of configuring it I removed it. The firewall built in XP and my router were plenty good enough back then and plenty good for what I do at home now.
 
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