Verizon & Ports

Patrick R. McManus mcmanus at ducksong.com
Sat Mar 23 11:08:10 EST 2002


are you talking about verizon dsl?

I have that service and 21,22,and 8080 are all still open for me..

indeed, 8080 being a high numbered port would be very difficult for
verizon to shutdown as some of your regular outgoing services
(i.e. http clients) can use it as a src port and would expect to have
packets coming back to the same address ;)

To this point verizon actually has a pretty good rep on these
issues.. as I understand it, even port 80 was open until code
red/nimda caused a nightmare because of all the webservers on
cable/dsl lines that people didn't even know they were running. 

They could just filter incoming SYNs to that address, but that's
atypical. Have you exhausted other possibilities?

-P

[Abhishake Pathak: Fri, Mar 22, 2002 at 03:32:33PM -0800]
> I was running my server and ports 21, 22, 8080 were
> open as i was running an ftp server and a web server. 
> I mentioned earlier my problem with verizon and how
> they have closed off port 80.  
> All of a sudden a few days ago all the ports were
> closed.  My router has these ports open and so does
> openbsd box.  
> I have a feeling that verizon did this.  Anyone know
> of this?  Could it be verizon or is it something else?
> 
> Abhishake
> 
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