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<div class=Section1>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>Dear </span></font><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>Zsolt,<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>Sorry for late response.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>I think you should check your multicast connection.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>You can use multicast beacon. <a
href="http://dast.nlanr.net/Projects/Beacon/">http://dast.nlanr.net/Projects/Beacon/</a><o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>AG Connector shuts down if your site has multicast
connection with UMTP Server.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>This might be the reason of dropping.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 face=Tahoma><span lang=EN-US style='font-size:
10.0pt;font-family:Tahoma'>And for firewall, in case of using iptables<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>What you need
to do is allowing outgoing traffic from your site and allowing incoming
traffics which comes as a response of the outgoing traffic from your site.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>In /etc/sysconfig/iptables<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>:OUTPUT ACCEPT
[0:0] // default policy of outgoing traffic, ACCEPT<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>-A INPUT -p
udp --dport 1025: -m state --state ESTABLISHED,RELATED -j ACCEPT &nbsp;//allow
incoming UDP traffics which comes as a response for the outgoing traffic from
your site<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>Or<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>You can open
udp port 8010(default AG Connector port) for both incoming and outgoing.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>:OUTPUT ACCEPT
[0:0] // default policy of outgoing traffic, ACCEPT<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>-A INPUT </span></font><font
size=2 color=navy face=Arial><span lang=EN-US style='font-size:10.0pt;
font-family:Arial;color:navy'>&#8211;</span></font><font size=2 color=navy
face=&#44404;&#47548;><span lang=EN-US style='font-size:10.0pt;font-family:
Gulim;color:navy'>p udp </span></font><font size=2 color=navy face=Arial><span
lang=EN-US style='font-size:10.0pt;font-family:Arial;color:navy'>&#8211;</span></font><font
size=2 color=navy face=&#44404;&#47548;><span lang=EN-US style='font-size:10.0pt;
font-family:Gulim;color:navy'>dport 8010 </span></font><font size=2 color=navy
face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial;
color:navy'>&#8211;</span></font><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>j ACCEPT<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>AG Connector only
uses one UDP port, 8010.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>If you need
more help, let me know.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'>Thanks for
using AG Connector.<o:p></o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<p class=MsoNormal><font size=2 color=navy face=&#44404;&#47548;><span
lang=EN-US style='font-size:10.0pt;font-family:Gulim;color:navy'><o:p>&nbsp;</o:p></span></font></p>

<div>

<p class=MsoPlainText style='margin:0cm;margin-bottom:.0001pt'><strong><b><font
size=4 color=black face="Book Antiqua"><span lang=DE style='font-size:13.5pt;
font-family:"Book Antiqua";color:black'>Namgon Kim</span></font></b></strong><font
color=navy face="Book Antiqua"><span lang=DE style='font-family:"Book Antiqua";
color:navy'><o:p></o:p></span></font></p>

<p class=MsoPlainText style='margin:0cm;margin-bottom:.0001pt'><font size=2
color=black face="Book Antiqua"><span lang=DE style='font-size:10.0pt;
font-family:"Book Antiqua";color:black'>Netmedia Lab, <U1:PLACE u2:st="on"><U1:CITY u2:st="on">GIST</U1:CITY>,
<U1:COUNTRY-REGION u2:st="on">KOREA</U1:COUNTRY-REGION></U1:PLACE></span></font><font
size=4 color=navy face="Book Antiqua"><span lang=DE style='font-size:13.5pt;
font-family:"Book Antiqua";color:navy'><o:p></o:p></span></font></p>

<p class=MsoPlainText style='margin:0cm;margin-bottom:.0001pt'><font size=3
color=navy face=Tahoma><span lang=DE style='font-size:12.0pt;font-family:Tahoma;
color:navy'>&nbsp;</span></font><font size=2 color=black face=Tahoma><span
lang=DE style='font-size:10.0pt;font-family:Tahoma;color:black'><o:p></o:p></span></font></p>

<p class=MsoPlainText style='margin:0cm;margin-bottom:.0001pt'><font size=2
color=black face="Bookman Old Style"><span lang=DE style='font-size:11.0pt;
font-family:"Bookman Old Style";color:black'><a
href="http://netmedia.gist.ac.kr/">http://netmedia.<span lang=EN-US>g</span>ist.ac.kr</a></span></font><font
size=2 color=black face="Bookman Old Style"><span lang=DE style='font-size:
11.0pt;font-family:"Bookman Old Style";color:black'><o:p></o:p></span></font></p>

</div>

<div>

<div class=MsoNormal align=center style='margin-left:39.95pt;mso-para-margin-left:
3.33gd;text-align:center'><font size=3 face="Times New Roman"><span lang=EN-US
style='font-size:12.0pt'>

<hr size=2 width="100%" align=center tabindex=-1>

</span></font></div>

<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma;
font-weight:bold'>From:</span></font></b><font size=2 face=Tahoma><span
lang=EN-US style='font-size:10.0pt;font-family:Tahoma'> Nagykaldi, Zsolt F.
(HSC) [mailto:Zsolt-Nagykaldi@ouhsc.edu] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, October 28, 2005
8:35 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">ag-tech@mcs.anl.gov</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> [AG-TECH] AG Connector</span></font><span
lang=EN-US><o:p></o:p></span></p>

</div>

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size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'><o:p>&nbsp;</o:p></span></font></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Our
department is new to the AG world and we are in the process of setting up a
room-based node to support our research infrastructure. Our network is not
multicast enabled, so we have been trying to make the AG Connector work for
weeks now and just about to give up. The documentation of the connector is very
sub-optimal, to put it politely. In AG connector -driven multicast, if we
manage to keep the connection to the server, which is dropped often, the other
parties, who HAVE multicast enabled on their networks can not see or hear us at
all (we can hear and see them). In unicast, without the connector, everything
works both ways, but we can not see any of the parties (no incoming video),
although we can hear them. I&nbsp;know that certain UDP ports must be
open,&nbsp;but it must be more complicated than that,
since&nbsp;*rarely*&nbsp;the whole system seems to be working well.&nbsp;The
connector seems to work unreliably in many situations and outcome is often
unpredictable.</span></font><span lang=EN-US><o:p></o:p></span></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>If
you have suggestions to both scenarios (multicast with connector and unicast
without), PLEASE, help us. </span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Thanks!</span></font><span
lang=EN-US><o:p></o:p></span></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Zsolt</span></font><span
lang=EN-US><o:p></o:p></span></p>

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size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 color=black face=Arial><span lang=EN-US style='font-size:10.0pt;
font-family:Arial;color:black'>_ _ _</span></font><span lang=EN-US><o:p></o:p></span></p>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 color=black face=Arial><span lang=EN-US style='font-size:10.0pt;
font-family:Arial;color:black'>Zsolt Nagykaldi, PhD</span></font><span
lang=EN-US><o:p></o:p></span></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Research
Associate, Clinical IT Specialist</span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>University
Of <st1:place w:st="on"><st1:PlaceName w:st="on">Oklahoma</st1:PlaceName> <st1:PlaceName
 w:st="on">Health</st1:PlaceName> <st1:PlaceName w:st="on">Sciences</st1:PlaceName>
 <st1:PlaceType w:st="on">Center</st1:PlaceType></st1:place></span></font><span
lang=EN-US><o:p></o:p></span></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Department
Of Family And Preventive Medicine</span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

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<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><st1:place
w:st="on"><st1:PlaceName w:st="on"><font size=2 face=Arial><span lang=EN-US
  style='font-size:10.0pt;font-family:Arial'>Oklahoma</span></font></st1:PlaceName><font
 size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>
 <st1:PlaceType w:st="on">Center</st1:PlaceType></span></font></st1:place><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>
For Family Medicine Research</span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

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size=3 face="Times New Roman"><span lang=EN-US style='font-size:12.0pt'>&nbsp;<o:p></o:p></span></font></p>

</div>

<div>

<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><st1:Street
w:st="on"><st1:address w:st="on"><font size=2 face=Arial><span lang=EN-US
  style='font-size:10.0pt;font-family:Arial'>900 NE 10th Street</span></font></st1:address></st1:Street><span
lang=EN-US><o:p></o:p></span></p>

</div>

<div>

<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><st1:place
w:st="on"><st1:City w:st="on"><font size=2 face=Arial><span lang=EN-US
  style='font-size:10.0pt;font-family:Arial'>Oklahoma City</span></font></st1:City><font
 size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>,
 <st1:State w:st="on">OK</st1:State> <st1:PostalCode w:st="on">73104</st1:PostalCode></span></font></st1:place><span
lang=EN-US><o:p></o:p></span></p>

</div>

<div>

<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Phone:
(405) 271-8000 Ext.:1-32212</span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

<div>

<p class=MsoNormal style='margin-left:39.95pt;mso-para-margin-left:3.33gd'><font
size=2 face=Arial><span lang=EN-US style='font-size:10.0pt;font-family:Arial'>Fax:&nbsp;&nbsp;&nbsp;&nbsp;
(405) 271-1682</span></font><span lang=EN-US><o:p></o:p></span></p>

</div>

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