North American Network Operators Group

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RE: Vonage complains about VoIP-blocking

  • From: Hannigan, Martin
  • Date: Tue Feb 15 16:50:04 2005

> -----Original Message-----
> From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of
> Eric Gauthier
> Sent: Tuesday, February 15, 2005 1:45 PM
> To: nanog@merit.edu
> Subject: Re: Vonage complains about VoIP-blocking
> 
> 
> 
> > > On Tue, Feb 15, 2005 at 11:53:59AM -0600, Adi Linden wrote:
> > >> How is this any different then blocking port 25 or 
> managing the bandwidth
> > >> certain applications use.
> 
> Something else to consider.  We block TFTP at our border for 
> security reasons 
> and we've found that this prevents Vonage from working.  
> Would this mean that 
> LEC's can't block TFTP?


Was that a device trying to phone home and get it's configs?
Cisco, Nortel, etc. phone home and get configs via tftp.

Vonage doesn't need to phone home for config. The device is 
programmed (router) and it registers with the call manager. 
If you analyze the transactions it's about 89% SIP and 11% SDP.


-M<