[Freeswitch-users] FreeSWITCH Sofia DNS Cache SIP/SDP INVITE Auth Fail

[Tony Graziano]

put two wire in bridged mode and use superior assimilated firewall
technology in lieu of striking rocks together to scare the packets into
alignment...

On Thu, Aug 26, 2010 at 1:41 PM, Michael Jerris <mike at jerris.com> wrote:

> The Borg have many technologies, apparently sip nat traversal is not one of
> them.
>
> Defense against assimilation:
>
> 1. Provide open sip server for communications with collective
> 2. Place behind 2-wire router
> 3. Laugh at their inability to traverse NAT
> 4. Repeat
>
>
> On Aug 26, 2010, at 9:04 AM, Locutis of Borg wrote:
>
> > Hi,
> >
> > I have been struggling with failed outbound calls to my ITSP.
> >
> > Seems that my FreeSWITCH does not know who to send SIP/SDP INVITE packets
> to.  FS has the DNS cached and uses that to send the first INVITE, then it
> gets expired and refreshes it to another IP, just in time for the second
> INVITE, causing an AUTHENTICATION failure.
> >
> > The packet capture would only show the 1st INVITE SIP to one resolved IP.
>  Then, the 2nd INVITE SIP/SDP to a different resolved IP.
> >
> > FS is on a DMZ.  I have extensively tested IPTABLES, NAT, and even
> rebuilt FS from the latest GIT 2 days ago.  In the ext. SIP profile, if I
> use hostname for proxy, initial calls fail, but on redial, they complete.
>  Now, in the same SIP profile, I use the IP address, call are OK.  (for
> both, REG is false)
> >
> > A reasonable solution seems to be to use the IP in the ext. SIP profile.
>  But, is that the best?
> >
> > Any experience with this kind of issue?  Any suggestion would be greatly
> appreciated.
> >
> > Thank you,
> > Cheers
> >
> >
> >
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>
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