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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Vonage complains about VoIP-blocking
> > > > > > 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. > > Many, many VoIP devices do this, including Cisco phones in > all major flavors. If an ISP is blocking TFTP originated by > its customers at the border, this will cause numerous > problems with many VoIP devices as well as numerous other > things where a customer needs to initiate a TFTP session over > the Internet. > > Filtering customer-initiated TFTP will cause problems with > many legitimate applications and devices. Consequently, should "unlikely or most likely not :)" be filtered by (I|N)SP, IMHO. Who's (still) using TFTP for fragile tasks...? Cheers, mh > > -- > Jay Hennigan - CCIE #7880 - Network Administration - [email protected] > WestNet: Connecting you to the planet. 805 884-6323 WB6RDV > NetLojix Communications, Inc. - http://www.netlojix.com/ > >
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