[asterisk-bugs] [JIRA] (ASTERISK-24210) T.38 UDPTL Frames are sent to wrong destination IP

[Matt Jordan (JIRA)]

    [ https://issues.asterisk.org/jira/browse/ASTERISK-24210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=221576#comment-221576 ] 

Matt Jordan commented on ASTERISK-24210:
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We require a complete debug log to help triage the issue. This document will provide instructions on how to collect debugging logs from an Asterisk machine for the purpose of helping bug marshals troubleshoot an issue: https://wiki.asterisk.org/wiki/display/AST/Collecting+Debug+Information



> T.38 UDPTL Frames are sent to wrong destination IP
> --------------------------------------------------
>
>                 Key: ASTERISK-24210
>                 URL: https://issues.asterisk.org/jira/browse/ASTERISK-24210
>             Project: Asterisk
>          Issue Type: Bug
>      Security Level: None
>          Components: Resources/res_fax
>    Affects Versions: 11.11.0
>         Environment: Linux vargas 3.2.0-4-amd64 #1 SMP Debian 3.2.60-1+deb7u3 x86_64 GNU/Linux
> compiled asterisk from here:
> http://downloads.asterisk.org/pub/telephony/asterisk/asterisk-11-current.tar.gz
>            Reporter: Daniel Steglich
>         Attachments: extensions.conf, sip.conf
>
>
> I configured a Fax2Mail extension (details see extensions.conf)
> Now I delete the following lines from sip.conf (see attached)
> nat=comedia
> t38pt_usertpsource=yes
> Then send a Fax from my peer 550000 to 429 (with T.38 enabled).
> Asterisk is sending re-invite and switching to T.38 which works fine.
> But the "connection information" from the "200 OK with SDP" from the client will be ignored.
> This means, when I start network trace on ethernet Interface connected to my peer, I do not see any udptl frames. When I start network trace on "lo" Interface of debian Server, I can see the udptl Frames (destination IP = IP where asterisk is bound to i.e. IP adress of eth1) which are rejected with icmp port unreachable.
> when adding the lines from above:
> nat=comedia
> t38pt_usertpsource=yes
> udptl is sent correctly.



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