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

[Daniel Steglich (JIRA)]

Daniel Steglich created ASTERISK-24210:
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             Summary: 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


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)

when adding the lines from above:
nat=comedia
t38pt_usertpsource=yes

udptl is sent correctly.



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