[Freeswitch-users] ext-sip-ip, dyndns and NAT

[Francis]

Stale DNS records will be an issue here, if your dynamic IP changes with 
each new lease. Then you have devices trying to connect on the old 
address, not having yet updated, or missing the most recent record 
refresh. This will cause random call drops. Another thing to consider, 
is this a free DNS service? If so, I wouldn't count on infinite 
resources being available to server lookup requests....

On 30/12/2015 5:24 PM, Sergey Safarov wrote:
>
> Capture dns traffic and analyze.
> Probable some resolv is wrong or fail.
>
>
> On Wed, Dec 30, 2015, 10:13 Rajil Saraswat <rajil.s at gmail.com 
> <mailto:rajil.s at gmail.com>> wrote:
>
>     Hello,
>
>     My pbx has a dynamic ip address and i am using the name
>     myhost.dyndns.org <http://myhost.dyndns.org> for it. Until now i
>     have had the following settings:
>
>     vars.xml
>     <X-PRE-PROCESS cmd="set"
>     data="external_rtp_ip=host:myhost.dyndns.org
>     <http://myhost.dyndns.org>"/>
>     <X-PRE-PROCESS cmd="set"
>     data="external_sip_ip=host:myhost.dyndns.org
>     <http://myhost.dyndns.org>"/>
>
>     Internal profile
>       <param name="ext-rtp-ip" value="$${external_rtp_ip}"/>
>       <param name="ext-sip-ip" value="$${external_sip_ip}"/>
>
>     However, with this I was getting a public ip in the contact header of
>     the calls. So i had to change the internal profile to
>       <param name="ext-rtp-ip" value="autonat:$${external_rtp_ip}"/>
>       <param name="ext-sip-ip" value="autonat:$${external_sip_ip}"/>
>
>     Unfortunately with the above change the system is unable to resolve
>     the dns address and sofia status profile internal' shows
>
>     Ext-SIP-IP              host:myhost.dyndns.org
>     <http://myhost.dyndns.org>
>
>     The calls fail randomly because of this. How can i use autonat with
>     the dynamic ip address?
>
>     Thanks
>     Rajil
>
>     PS: If i use the dynamic ip address in the the conf file, there is no
>     problem. (<X-PRE-PROCESS cmd="set"
>     data="external_sip_ip=aa.bb <http://aa.bb>.cc.dd"/>)
>
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