[77977] in North American Network Operators' Group
RE: Vonage complains about VoIP-blocking
daemon@ATHENA.MIT.EDU (Hannigan, Martin)
Tue Feb 15 17:18:53 2005
From: "Hannigan, Martin" <hannigan@verisign.com>
To: "'Jay Hennigan'" <jay@west.net>
Cc: Eric Gauthier <eric@roxanne.org>, nanog@merit.edu
Date: Tue, 15 Feb 2005 17:14:13 -0500
Errors-To: owner-nanog-outgoing@merit.edu
> -----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.
