Brian West, With my mostly default, current configuration, I am seeing Freeswitch send out simultaneous IPv4 and IPv6 registration attempts — not just one or the other. I am only configuring the (IPv4) IP address of the SIP proxy. I assume Freeswitch is defaulting to use port 5060. And empirically, it’s completely random as to which type of registration (IPv4 vs. IPv6) succeeds. And if, for example, IPv6 registration succeeds, then the registration attempts for IPv4 continue retrying in the background. See my “sofia status” output below — IPv6=REGED and IPv4=TRYING (retry: 20s). My specific question is what Freeswitch configuration should I change to only have one type of registration? How do I: “…you should pick where you want your gateway to register at, and only allow it there and there only…”? Thanks, George From: freeswitch-users-bounces@lists.freeswitch.org [mailto:freeswitch-users-bounces@lists.freeswitch.org] On Behalf Of Brian West Sent: Friday, January 02, 2015 12:13 PM To: FreeSWITCH Users Help Subject: Re: [Freeswitch-users] Control of IPv6 vs. IPv4 FreeSWITCH does one or the other, you should pick where you want your gateway to register at, and only allow it there and there only. On Fri, Jan 2, 2015 at 10:02 AM, George F. Phelps <GeorgePhelps@gfphelps.com> wrote: My VoIP provider supports both IPv4 and IPV6 registrations. I can only have one registration active at a time. Freeswitch is attempting both IPv4 and IPv6 connections. Randomly, sometimes a IPv4 connection is the first (only) registration established; other times it is the IPv6 connection. How to I configure Freeswitch to deterministically only attempt one type (my choice of either IPv4 or IPv6) of connection? freeswitch@ip-172-31-33-109.ec2.internal> sofia status Name Type Data State ================================================================================================= external-ipv6 profile sip:mod_sofia@[::1]:5080 RUNNING (0) external-ipv6::switch2voip.us gateway sip:XXXXXXXXXX@66.33.147.150 <mailto:sip%3AXXXXXXXXXX@66.33.147.150> REGED external profile sip:mod_sofia@54.174.255.168:5080 RUNNING (0) external::switch2voip.us gateway sip:XXXXXXXXXX@66.33.147.150 <mailto:sip%3AXXXXXXXXXX@66.33.147.150> TRYING (retry: 20s) 172.31.33.109 alias internal ALIASED internal-ipv6 profile sip:mod_sofia@[::1]:5060 RUNNING (0) internal profile sip:mod_sofia@54.174.255.168:5060 RUNNING (0) ================================================================================================= 4 profiles 1 alias freeswitch@ip-172-31-33-109.ec2.internal> Thanks, George _________________________________________________________________________ Professional FreeSWITCH Consulting Services: consulting@freeswitch.org http://www.freeswitchsolutions.com Official FreeSWITCH Sites http://www.freeswitch.org http://confluence.freeswitch.org http://www.cluecon.com FreeSWITCH-users mailing list FreeSWITCH-users@lists.freeswitch.org http://lists.freeswitch.org/mailman/listinfo/freeswitch-users UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users http://www.freeswitch.org -- Brian West brian@freeswitch.org <http://billing.freeswitch.org/templates/default/img/whmcslogo.png> Twitter: @FreeSWITCH , @briankwest http://www.freeswitchbook.com http://www.freeswitchcookbook.com T:+19184209001 | F:+19184209002 | M:+1918424WEST (9378) iNUM:+883 5100 1420 9001 | ISN:410*543 | Skype:briankwest