North American Network Operators Group

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RE: Vonage complains about VoIP-blocking

  • From: Jason L. Schwab
  • Date: Tue Feb 15 17:25:15 2005

Hi;

I unplugged and reset my vonage Motorola MTA device, and it did tftp to
home to get its configs.

-Jason

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of
Hannigan, Martin
Sent: Tuesday, February 15, 2005 3:14 PM
To: 'Jay Hennigan'
Cc: Eric Gauthier; [email protected]
Subject: RE: Vonage complains about VoIP-blocking


> -----Original Message-----
> From: Jay Hennigan [mailto:[email protected]]
> Sent: Tuesday, February 15, 2005 5:10 PM
> To: Hannigan, Martin
> Cc: Eric Gauthier; [email protected]
> Subject: RE: Vonage complains about VoIP-blocking
> 
> 
> On Tue, 15 Feb 2005, Hannigan, Martin wrote:
> 
> > > 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.
> 
> Vonage devices initiate an outbound TFTP connection back to Vonage to
> snarf their configs on initial connection and also 
> (presumably) on reboot.

I tested the reboot. I didn't see it. I agree in general
and think that providers shouldn't block tftp, IMHO.