[SR-Users] Issue with ACK behind NAT

[Alberto Sagredo]

Yes Alex.

I see ACK sent to 192.168.0.170:8002 from Asterisk as follows:

set_destination: Parsing <sip:192.168.0.170:8002;nat=no;ftag=as2e5fc0a0;lr=on>
for address/port to send to

set_destination: set destination to 192.168.0.170:8002

Transmitting (no NAT) to 192.168.0.170:8002:

ACK sip:110 at PUBLIC.IP:5066 SIP/2.0

Via: SIP/2.0/UDP 172.26.101.10:5080;branch=z9hG4bK1ea10df7

Route: <sip:192.168.0.170:8002;nat=no;ftag=as2e5fc0a0;lr=on>

Max-Forwards: 70

From: "asterisk" <sip:110 at 172.26.101.10:5080>;tag=as2e5fc0a0

To: <sip:110 at 172.26.101.50:8002>;tag=1581756788

Contact: <sip:110 at 172.26.101.10:5080>

Call-ID: 394e67ee58605adc1986c1276312c686 at 172.26.101.10:5080

CSeq: 102 ACK

User-Agent: ast01

Content-Length: 0


And no ACK to Public IP Sent, so it dies at 32 secs without beeing answered
insted of answered call (No ACK for 200 OK issue) as expected



2015-07-29 9:44 GMT+02:00 Alex Balashov <abalashov at evaristesys.com>:

> On 07/29/2015 03:44 AM, Alberto Sagredo wrote:
>
>  Could be Kamailio discarding this ACK In anyway?
>>
>
> It's possible, but have you made absolute sure that it's not trying to
> send it to PUBLIC_IP:5066?
>
>
> --
> Alex Balashov | Principal | Evariste Systems LLC
> 303 Perimeter Center North, Suite 300
> Atlanta, GA 30346
> United States
>
> Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)
> Web: http://www.evaristesys.com/, http://www.csrpswitch.com/
>
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