[asterisk-bugs] [JIRA] (ASTERISK-29235) res_pjsip_nat: Contact is rewritten on REGISTER responses with external_signaling_address

[Brian Paboojian (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-29235?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=253301#comment-253301 ] 

Brian Paboojian commented on ASTERISK-29235:
--------------------------------------------

>From the NAT device;

<--- Transmitting SIP request (449 bytes) to UDP:192.168.60.102:5060 --->
OPTIONS sip:1000 at 192.168.60.102:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP 192.168.60.239:5060;rport;branch=z9hG4bKPj87b2c3e3-d523-43cc-b8e6-8c420031903d
From: <sip:1000 at 192.168.60.239>;tag=e217a666-54ab-454d-aa44-a9662ce5e317
To: <sip:1000 at 192.168.60.102>
Contact: <sip:1000 at 192.168.60.239:5060>
Call-ID: 0086d5ee-cdbf-4848-83bb-67e0a42b0b52
CSeq: 53638 OPTIONS
Max-Forwards: 70
User-Agent: FPBX-15.0.17.12(16.15.1)
Content-Length:  0


> res_pjsip_nat: Contact is rewritten on REGISTER responses with external_signaling_address
> -----------------------------------------------------------------------------------------
>
>                 Key: ASTERISK-29235
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-29235
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip_nat, Resources/res_pjsip_registrar
>    Affects Versions: 13.36.0, 16.13.0
>         Environment: Freepbx 15 distro
>            Reporter: Brian Paboojian
>            Assignee: Unassigned
>            Severity: Minor
>              Labels: fax, webrtc
>         Attachments: eth1-EM.pcap, eth1-NAT.pcap
>
>
> I am testing SD-Wan with my Ribbon Edgemarc. The phone is sending the registration to the eSBC and then the SBC forwards the registration onto the Freepbx 15 system. Asterisk is rewriting the contact header when it sends the registration back to the phone and the Edgemarc is blocking it because this rewrite is a violation of RFC 3261. I have turned off contact rewrite in extension advanced settings. In reviewing the pcap reveal the contact header is still being rewritten.
> I have confirmed this setting in the config file Pjsip.endpoint.conf;
> rewrite_contact=no
> I worked with a Freepbx Engineer and he agrees this is an Asterisk bug.



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