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RE: Vonage complains about VoIP-blocking

  • From: Michael Hallgren
  • Date: Tue Feb 15 17:49:30 2005

ssh, or other schemes of enhanced security...?

mh

> -----Message d'origine-----
> De : owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] De 
> la part de Daniel Golding
> Envoyé : mardi 15 février 2005 23:39
> À : Jason L. Schwab; Martin Hannigan
> Cc : nanog@merit.edu
> Objet : Re: Vonage complains about VoIP-blocking
> 
> 
> 
> Is there any move on the part of providers/manufacturers to 
> use more secure protocols for this?
> 
> - Dan
> 
> On 2/15/05 5:22 PM, "Jason L. Schwab" <jlschwab@jlschwab.com> wrote:
> 
> > 
> > Hi;
> > 
> > I unplugged and reset my vonage Motorola MTA device, and it 
> did tftp 
> > to home to get its configs.
> > 
> > -Jason
> > 
> > -----Original Message-----
> > From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu] 
> On Behalf 
> > Of Hannigan, Martin
> > Sent: Tuesday, February 15, 2005 3:14 PM
> > To: 'Jay Hennigan'
> > Cc: Eric Gauthier; nanog@merit.edu
> > Subject: RE: Vonage complains about VoIP-blocking
> > 
> > 
> >> -----Original Message-----
> >> From: Jay Hennigan [mailto:jay@west.net]
> >> Sent: Tuesday, February 15, 2005 5:10 PM
> >> To: Hannigan, Martin
> >> Cc: Eric Gauthier; nanog@merit.edu
> >> 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.
> > 
> 
> --
> Daniel Golding
> Network and Telecommunications Strategies Burton Group
> 
> 
> 
>