[Spce-user] correct NAT configuration
Joan Cifre (ibred)
jcifre at ib-red.com
Fri Dec 28 08:22:27 EST 2012
Hello all,
we are experiencing many issues regarding to NAT with our SIP
registration. Our phones register correctly, but if public IP changes,
the phones failed to register again. We have noted it after a problem
with DHCP that changed may of the public IPs of our customers routers.
I'm sure it can be optimized and probably our configuration of phones
and routers is not optimal. The first we can observe is that in the
Sipwise administration interface, in the registration of the phone, we
are getting "NAT: no" in all registrations.
User Agent: Grandstream HT701 1.0.0.18
Contact sip:n971520810 at 141.105.96.102:5060
NAT no
Expires2012-12-22 03:52:39
But in fact phones are behind NAT (they have private IP address). Our
routers have NAT helpers with SIP ports configured (5060, 5061). And
also our phones have NAT mapping enable set to yes, but no STUN server
configured. Is there a better configuration than this one? Maybe Sipwise
could handle the NAT itself? As I told the problem is when the public IP
changes.
Thanks and regards,
Joan
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