Vonage complains about VoIP-blocking

Tue Feb 15 22:38:38 UTC 2005

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 at 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 at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of
> Hannigan, Martin
> Sent: Tuesday, February 15, 2005 3:14 PM
> To: 'Jay Hennigan'
> Cc: Eric Gauthier; nanog at merit.edu
> Subject: RE: Vonage complains about VoIP-blocking
> 
> 
>> -----Original Message-----
>> From: Jay Hennigan [mailto:jay at west.net]
>> Sent: Tuesday, February 15, 2005 5:10 PM
>> To: Hannigan, Martin
>> Cc: Eric Gauthier; nanog at 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