Re: Has anyone asked Comcast to stop blocking inbound ports?

["Kristian Erik Hermansen" <user=152@nabble.blu.org>]

 On Dec 20, 2007 8:12 PM, Matthew Gillen <[hidden email]> wrote: 
> Well when using nmap, supposing your firewall is off, if you get back 
> "port closed", then your ISP is letting the SYN through.  If you get 
> "filtered", then you know the ISP is blocking. 

This is not necessarily true.  It is possible for any upstream ISP to 
inject RST packets at will, and this is potentially what Comcast does 
for some services.  If you get no response, then it usually means the 
packet is being filtered or your peered host did not like you... 
-- 
Kristian Erik Hermansen 
"I have no special talent. I am only passionately curious." 

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