ATT BroadBand Port Blocking

Vince McHugh vince_mchugh at yahoo.com
Sat Feb 8 23:06:51 EST 2003


--- dsr at tao.merseine.nu wrote:
> On Sat, Feb 08, 2003 at 05:46:10PM -0800, Vince
> McHugh wrote:
> >    You may want to be careful using nmap. Some
> ISPs
> > regard port scanning as cracking or a prelude to
> > cracking and may shut down your internet service.
> Nmap
> > is a cool tool but is also used by the "black
> hats" to
> > see what services are open so they can then attemp
> to
> > crack the box. 
> 
> No ISP is going to notice or care if you are
> scanning your own box.

 Maybe I misunderstood one of the earlier posting that
said... 

>>http://www.insecure.org/nmap/nmap_documentation.html

>>You could use this from the outside to see what's
>>available on your 
>>Linux box.

 From this post it seems like the discussion was
someone from outside of the local network trying to
use nmap to port scan. 

 If this is the case there is no way an ISP could know
that this is one friendly person trying to help out
another (with no evil intention).

 The reason I brought up the issue was because of post
from another mailing list where an individual had his
box hacked and ATT shut him down (turned off his
internet connection) because his box was detected port
scanning others. He had a H*ll of a time convincing
ATT to turn his service back on. 

 I'm not looking to start a flame war over this. We're
all "big boys" with free will. Do as you please. 

             Regards,
           Vince McHugh

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