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<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'>The XP
firewall is “stateless” and doesn’t try to inspect every
packet. On one hand this means that it can’t do the fancy decision
making that ZoneAlarm and Sygate do. On the other hand, it doesn’t
have the performance issues under a lot of traffic that they do (so it works
well for applications like Access Grid and Conference XP).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'>You can
programmatically open & close ports for the Windows XP Firewall. The
source code for how ConferenceXP does this is in the Firewall.cs file in the
MSR.LST.Net.Rtp project (see <a href="http://www.conferencexp.net/">http://www.conferencexp.net</a>
to download). For descriptions on how the Windows XP Firewall works and
how to program it, see the documentation on MSDN (<a
href="http://msdn.microsoft.com/">http://msdn.microsoft.com</a>).
There’s a URL to use Google to search MSDN for Firewall documentation
& APIs & sample code:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'><a
href="http://www.google.com/search?sourceid=navclient&q=site%3Amsdn%2Emicrosoft%2Ecom+firewall"
title="http://www.google.com/search?sourceid=navclient&q=site%3Amsdn%2Emicrosoft%2Ecom+firewall">http://www.google.com/search?sourceid=navclient&q=site%3Amsdn%2Emicrosoft%2Ecom+firewall</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'>Hope this
helps…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=blue face="Century Gothic"><span
style='font-size:10.0pt;font-family:"Century Gothic";color:blue'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=navy face=Papyrus><span style='font-size:
10.0pt;font-family:Papyrus;color:navy'>Todd Needham</span></font><font
color=blue><span style='color:blue'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Papyrus><span style='font-size:
10.0pt;font-family:Papyrus;color:navy'>Manager, Research Programs Group</span></font><font
color=blue><span style='color:blue'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Papyrus><span style='font-size:
10.0pt;font-family:Papyrus;color:navy'>Microsoft Research</span></font><font
color=blue><span style='color:blue'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 color=blue face="Times New Roman"><span
style='font-size:12.0pt;color:blue'><a href="http://research.microsoft.com"><font
size=2 color=navy face=Papyrus><span style='font-size:10.0pt;font-family:Papyrus;
color:navy'>http://research.microsoft.com</span></font></a></span></font><font
size=2 color=navy face="Comic Sans MS"><span style='font-size:10.0pt;
font-family:"Comic Sans MS";color:navy'> </span></font><o:p></o:p></p>
</div>
<div>
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face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
owner-ag-tech@mcs.anl.gov [mailto:owner-ag-tech@mcs.anl.gov] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Chris Rosenthal<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, July 08, 2004
11:07 AM<br>
<b><span style='font-weight:bold'>To:</span></b> ag-tech@mcs.anl.gov<br>
<b><span style='font-weight:bold'>Cc:</span></b> ag-tech@evl.uic.edu<br>
<b><span style='font-weight:bold'>Subject:</span></b> [AG-TECH] Firewalls for
the AG</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I’m creating an all-in-one WinXP node and we’re
having some trouble with the firewall. I’ve tried ZoneAlarm and
Sygate, but they both seem to hog the CPU when there’s a lot of multicast
traffic. I haven’t been able to configure the WinXP firewall to
allow multicast traffic.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>What firewall are you using with WinXP and how well is it
working with the AG?</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I appreciate your comments.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Thanks,</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Chris</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>------------------------------------------------------------------------------------</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Chris Rosenthal</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Phone: (312) 996-3002</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Email: cmr@evl.uic.edu</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Electronic Visualization Laboratory</span></font><o:p></o:p></p>
<p class=MsoNormal><st1:place w:st="on"><st1:PlaceType w:st="on"><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>University</span></font></st1:PlaceType><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> of <st1:PlaceName
w:st="on">Illinois</st1:PlaceName></span></font></st1:place><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'> - Chicago</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
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