[asterisk-bugs] [JIRA] (ASTERISK-28908) pjsip_message_filter: 400 'Missing Contact header' reply to wrong port

[Alexei Gradinari (JIRA)]

     [ https://issues.asterisk.org/jira/browse/ASTERISK-28908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alexei Gradinari updated ASTERISK-28908:
----------------------------------------

    Attachment: sip_trace.txt

1.2.3.14 - asterisk public ip-address
4.5.6.40 - endpoint source ip-address
192.168.15.177 - endpoint ip-address behind the nat


> pjsip_message_filter: 400 'Missing Contact header' reply to wrong port
> ----------------------------------------------------------------------
>
>                 Key: ASTERISK-28908
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-28908
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_pjsip
>    Affects Versions: 16.10.0
>            Reporter: Alexei Gradinari
>         Attachments: sip_trace.txt
>
>
> The endpoint is behind the NAT (rewrite_contact=yes, force_rport=yes).
> The endpoint sends keep alive using NOTIFY messages.
> The NOTIFY message missing Contact header.
> The asterisk replies on this message to the port using 'Via' header.
> This port is behind the NAT so it's not reachable.
> The asterisk has to use source IP address and port.



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