<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><br>Hi,<br><br>During proxy authentication, I got "mandatory IE missing" error in the response as shown below. How this error can be resolved?<br><br><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="ProgId" content="Word.Document"><meta name="Generator" content="Microsoft Word 11"><meta name="Originator" content="Microsoft Word 11"><link rel="File-List" href="file:///C:%5CDOCUME%7E1%5CAALRUB%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml"><!--[if gte mso 9]><xml>
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<p class="MsoNormal">recv 585 bytes from udp/[209.82.10.250]:1898 at
15:31:39.933782:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>INVITE
sip:9999@209.82.10.235 SIP/2.0</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
sip:9999@209.82.10.235</p>
<p class="MsoNormal"><span style=""> </span>Contact:
sip:1002@209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988828
INVITE</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 187</p>
<p class="MsoNormal"><span style=""> </span>Content-Type:
application/sdp</p>
<p class="MsoNormal"><span style=""> </span>User-Agent: HelpCaster
SoftPHONE</p>
<p class="MsoNormal"><span style=""> </span>Supported:
com.hearme.mux</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style=""> </span>v=0</p>
<p class="MsoNormal"><span style=""> </span>o=HelpCaster
153553387 153553387 IN IP4 192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>s=HelpCaster</p>
<p class="MsoNormal"><span style=""> </span>c=IN IP4
209.82.10.250</p>
<p class="MsoNormal"><span style=""> </span>t=0 0</p>
<p class="MsoNormal"><span style=""> </span>m=audio 8002
RTP/AVP 0 4 101</p>
<p class="MsoNormal"><span style=""> </span>a=rtpmap:101
telephone-event/8000</p>
<p class="MsoNormal"><span style=""> </span>a=fmtp:101 0-15</p>
<p class="MsoNormal"><span style=""> </span>------------------------------------------------------------------------</p>
<p class="MsoNormal">send 294 bytes to udp/[209.82.10.250]:1091 at
15:31:39.934100:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>SIP/2.0 100 Trying</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
sip:9999@209.82.10.235</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988828
INVITE</p>
<p class="MsoNormal"><span style=""> </span>User-Agent:
FreeSWITCH-mod_sofia/1.0.2-hacked</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">send 746 bytes to udp/[209.82.10.250]:1091 at
15:31:39.938913:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>SIP/2.0 407 Proxy
Authentication Required</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
<sip:9999@209.82.10.235>;tag=K83mZmZH8g3Hr</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988828
INVITE</p>
<p class="MsoNormal"><span style=""> </span>User-Agent:
FreeSWITCH-mod_sofia/1.0.2-hacked</p>
<p class="MsoNormal"><span style=""> </span>Accept:
application/sdp</p>
<p class="MsoNormal"><span style=""> </span>Allow: INVITE, ACK,
BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE,
REGISTER, INFO, PUBLISH</p>
<p class="MsoNormal"><span style=""> </span>Supported: timer,
precondition, path, replaces</p>
<p class="MsoNormal"><span style=""> </span>Allow-Events: talk,
presence, dialog, call-info, sla, include-session-description, presence.winfo,
message-summary, refer</p>
<p class="MsoNormal"><span style=""> </span>Proxy-Authenticate:
Digest realm="209.82.10.235",
nonce="248a2800-7fd2-4a6f-8082-5d1731f3cf54"</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">recv 280 bytes from udp/[209.82.10.250]:1898 at
15:31:39.949517:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>ACK
sip:9999@209.82.10.235 SIP/2.0</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
<sip:9999@209.82.10.235>;tag=K83mZmZH8g3Hr</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988828 ACK</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">recv 584 bytes from udp/[209.82.10.250]:1898 at
15:31:39.953137:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>INVITE
sip:9999@209.82.10.235 SIP/2.0</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
sip:9999@209.82.10.235</p>
<p class="MsoNormal"><span style=""> </span>Contact:
sip:1002@209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988829
INVITE</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 187</p>
<p class="MsoNormal"><span style=""> </span>Content-Type:
application/sdp</p>
<p class="MsoNormal"><span style=""> </span>User-Agent:
HelpCaster SoftPHONE</p>
<p class="MsoNormal"><span style=""> </span>Supported:
com.hearme.mux</p>
<p class="MsoNormal"><span style="">
</span>Proxy-Authorization:<span style=""> </span>Digest
username="1002",realm="209.82.10.235",nonce="248a2800-7fd2-4a6f-8082-5d1731f3cf54",response="</p>
<p class="MsoNormal">d1614cd024acab0b794751285f5cb1fe",uri="sip:9999@209.82.10.235"</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">send 294 bytes to udp/[209.82.10.250]:1091 at
15:31:39.953336:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>SIP/2.0 100 Trying</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
sip:9999@209.82.10.235</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988829
INVITE</p>
<p class="MsoNormal"><span style=""> </span>User-Agent:
FreeSWITCH-mod_sofia/1.0.2-hacked</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">send 696 bytes to udp/[209.82.10.250]:1091 at
15:31:39.956016:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>SIP/2.0 480
Temporarily Unavailable</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
<sip:9999@209.82.10.235>;tag=mHXD1FgN5SS4K</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988829
INVITE</p>
<p class="MsoNormal"><span style=""> </span>User-Agent:
FreeSWITCH-mod_sofia/1.0.2-hacked</p>
<p class="MsoNormal"><span style=""> </span>Accept:
application/sdp</p>
<p class="MsoNormal"><span style=""> </span>Allow: INVITE, ACK,
BYE, CANCEL, OPTIONS, PRACK, MESSAGE, SUBSCRIBE, NOTIFY, REFER, UPDATE,
REGISTER, INFO, PUBLISH</p>
<p class="MsoNormal"><span style=""> </span>Supported: timer,
precondition, path, replaces</p>
<p class="MsoNormal"><span style=""> </span>Allow-Events: talk,
presence, dialog, call-info, sla, include-session-description, presence.winfo,
message-summary, refer</p>
<p class="MsoNormal"><span style=""> </span>Reason:
Q.850;cause=96;text="MANDATORY_IE_MISSING"</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal">recv 280 bytes from udp/[209.82.10.250]:1898 at
15:31:39.964632:</p>
<p class="MsoNormal"><span style="">
</span>------------------------------------------------------------------------</p>
<p class="MsoNormal"><span style=""> </span>ACK
sip:9999@209.82.10.235 SIP/2.0</p>
<p class="MsoNormal"><span style=""> </span>Via: SIP/2.0/UDP
209.82.10.250:1091</p>
<p class="MsoNormal"><span style=""> </span>From: HC-Desktop
<sip:1002@209.82.10.235>;tag=55409708</p>
<p class="MsoNormal"><span style=""> </span>To:
<sip:9999@209.82.10.235>;tag=mHXD1FgN5SS4K</p>
<p class="MsoNormal"><span style=""> </span>Call-ID:
8e6df5d2-0367-43d9-bda8-f51a94033473@192.168.10.31</p>
<p class="MsoNormal"><span style=""> </span>CSeq: 421988829 ACK</p>
<p class="MsoNormal"><span style=""> </span>Content-Length: 0</p>
<br>Thanks!<br><br><br><br></td></tr></table><br>