On 11/20/2015 12:14 PM, Carlos Alvarez wrote: > We're starting to see customers who get random arbitrary ringing caused by > a random connection attempt from the internet. Most of our customers have > Cisco routers with full-cone NAT, so it's easy to do that. We don't > reinvite handsets, we proxy the media, so we've considered using restricted > NAT instead. If we can figure out how, we can't find any documentation on > how to do it, and don't have a response to our Cisco TAC case on it yet. > > But I figured I'd ask if others have come up with better solutions. I know > there are a few authentication options in the phones themselves, but they > seem to vary greatly by vendor and even by model. I like to do things as > simply and system-wide as possible. We primarily sell Grandstream, and we > support Cisco/Linksys SPA as well as Polycom IP series (not VVX). > > We're an Asterisk-based hosted service provider. > > > > _______________________________________________ > VoiceOps mailing list > [email protected] > https://puck.nether.net/mailman/listinfo/voiceops >
This may be dependent upon the Cisco router in question, but when we deploy routers we always set the ACL to only allow SIP communications from our SBC. - When customers provide their own, we recommend the same settings. -- Robert Johnson BendTel, Inc. (541)389-4020 Central Oregon's Own Telephone and Internet Service Provider http://bendtel.com/about/ _______________________________________________ VoiceOps mailing list [email protected] https://puck.nether.net/mailman/listinfo/voiceops
