Boston Linux & Unix (BLU) Home | Calendar | Mail Lists | List Archives | Desktop SIG | Hardware Hacking SIG
Wiki | Flickr | PicasaWeb | Video | Maps & Directions | Installfests | Keysignings
Linux Cafe | Meeting Notes | Blog | Linux Links | Bling | About BLU

BLU Discuss list archive


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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



 Kristian Erik Hermansen wrote: 
> 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... 

This is exactly what I was talking about in the second half of the message 
(the part you didn't quote about the EFF's tool). 

Matt 

-- 
This message has been scanned for viruses and 
dangerous content by MailScanner, and is 
believed to be clean. 

_______________________________________________ 
Discuss mailing list 
[hidden email] 
http://lists.blu.org/mailman/listinfo/discuss
 


BLU is a member of BostonUserGroups
BLU is a member of BostonUserGroups
We also thank MIT for the use of their facilities.

Valid HTML 4.01! Valid CSS!



Boston Linux & Unix / webmaster@blu.org