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Thanks Joe,<br><br>
We are helping a large number of K-12 schools setup Access Grid
nodes in their schools. Many of these schools are using NAT.
We've found some of the network administrators at the schools don't have
the ability, or willingness, to re-configure the NAT router. So we
looking for an alternative. Any help you could give would be
appreciated.<br><br>
Thanks,<br>
George<br><br>
At 06:21 PM 9/11/2007 -0500, Joseph Stone wrote:<br>
<blockquote type=cite class=cite cite>Yes. I've kicked around the
idea with Zsolt about doing a session over the AG, perhaps in my venue
server. Caveat: It currently has been tested and is set up for
2.4<br>
I think I now know how to make it work with a 3.0 environment but would
need time to get it there. I can discuss this more.<br>
My current boss needs to know I plan to share the experience before I can
solidly commit.<br><br>
Joe<br><br>
On Sep 11, 2007, at 3:35 PM, George Estes wrote:<br><br>
<blockquote type=cite class=cite cite>Joe,<br><br>
Would you be willing to share your experience in setting up the
OpenVPN/Bridge?<br><br>
Thanks,<br>
George<br>
<blockquote type=cite class=cite cite>X-Envelope-From:
<a href="mailto:Zsolt-Nagykaldi@ouhsc.edu">Zsolt-Nagykaldi@ouhsc.edu</a><br>
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<<a href="mailto:gestes@ncsa.uiuc.edu">gestes@ncsa.uiuc.edu</a>><br>
Subject: RE: [AG-TECH] NAT and bridge traffic<br>
Date: Tue, 11 Sep 2007 12:51:27 -0500<br>
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From: "Nagykaldi, Zsolt F. \(HSC\)"
<<a href="mailto:Zsolt-Nagykaldi@ouhsc.edu">Zsolt-Nagykaldi@ouhsc.edu</a>><br>
To: "George Estes"
<<a href="mailto:gestes@ncsa.uiuc.edu">gestes@ncsa.uiuc.edu</a>><br>
Cc:
<<a href="mailto:ag-tech@mcs.anl.gov">ag-tech@mcs.anl.gov</a>><br>
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<br>
<font face="arial" size=2>OpenVPN allows you to put your remote client
computer "physically" and very securely on an ad-hoc local
network. Therefore, as the most simple setup, you can run an OpenVPN
server on the same machine that you use for the bridge server and handle
remote clients as local network clients, allowing access to the bridge
for a range of local IPs only (e.g. 10.10.x.x), in addition to your
regular bridge access over the Internet. For intricate technical details
of fine-tuning the bridge server, I would encourage you to contact Joe at
<a href="mailto:stone004@umn.edu">stone004@umn.edu</a>.</font><br>
<br>
<br>
<font face="arial" size=2>Zsolt</font><br>
<br>
<br>
<font face="arial" size=2>---</font><br>
<br>
<font face="arial" size=2>Zsolt Nagykaldi, PhD<?xml:namespace prefix =
o ns =
"<a href="urn:schemas-microsoft-com">urn:schemas-microsoft-com</a>:office:office"
/></font><br>
<font face="arial" size=2>Assistant Professor of Research</font><br>
<font face="arial" size=2>Clinical IT Specialist</font><br>
<font face="arial" size=2> </font><br>
<font face="arial" size=2>University of <?xml:namespace prefix = st1
ns =
"<a href="urn:schemas-microsoft-com">urn:schemas-microsoft-com</a>:office:smarttags"
/>Oklahoma Health Sciences Center</font><br>
<font face="arial" size=2>Department of Family & Preventive
Medicine</font><br>
<font face="arial" size=2>900 N.E. 10th Street</font><br>
<font face="arial" size=2>Oklahoma City, OK 73104</font><br>
<font face="arial" size=2> </font><br>
<font face="arial" size=2>Phone: (405) 271-8000 ext.1-32208</font><br>
<font face="arial" size=2>Fax: (405)
271-2784</font><br><br>
<hr>
<font face="tahoma" size=2><b>From:</b> George Estes
[<a href="mailto:gestes@ncsa.uiuc.edu" eudora="autourl">mailto:gestes@ncsa.uiuc.edu</a>]<br>
<b>Sent:</b> Tue 9/11/2007 12:08 PM<br>
<b>To:</b> Nagykaldi, Zsolt F. (HSC)<br>
<b>Cc:</b>
<a href="mailto:ag-tech@mcs.anl.gov">ag-tech@mcs.anl.gov</a><br>
<b>Subject:</b> RE: [AG-TECH] NAT and bridge traffic<br>
</font><br>
Zsolt,<br><br>
What's the basic setup for using OpenVPN with a bridge?<br><br>
Thanks,<br>
George<br><br>
At 10:46 AM 9/11/2007 -0500, Nagykaldi, Zsolt F. \(HSC\) wrote:<br>
<blockquote type=cite class=cite cite><br>
<br>
<font face="arial" size=2>It is generally a pain in the back to establish connections to bridge servers in a NAT -ed environment. Port forwarding is one of your options, however there are a number of issues: 1) A large number of ports may need to be forwarded depending on the bridge setup and how many bridges you want to access (security implications); 2) Some older Cisco firewalls without a decent GUI may give you a hard time to create the appropriate rules to do what you need.</font><br>
<br>
<font face="arial" size=2>My suggestion is to forget about ports and use OpenVPN on the bridge and the client machine to go through the NAT -ed network and everything in between your computer and the bridge. We have a significant experience with this and pretty good results. Your absolute expert (who came up with the combined bridge/Open VPN server solution) is Joe Stone (<a href="mailto:stone004@umn.edu">stone004@umn.edu</a>). I can also help, if needed.</font><br>
<br>
<font face="arial" size=2>Zsolt</font><br>
<br>
<br>
<font face="arial" size=2>---</font><br>
<br>
<font face="arial" size=2>Zsolt Nagykaldi, PhD<?xml:namespace prefix = o ns = "<a href="urn:schemas-microsoft-com">urn:schemas-microsoft-com</a>:office:office" /></font><br>
<font face="arial" size=2>Assistant Professor of Research</font><br>
<font face="arial" size=2>Clinical IT Specialist</font><br>
<font face="arial" size=2> </font><br>
<font face="arial" size=2>University of <?xml:namespace prefix = st1 ns = "<a href="urn:schemas-microsoft-com">urn:schemas-microsoft-com</a>:office:smarttags" />Oklahoma Health Sciences Center</font><br>
<font face="arial" size=2>Department of Family & Preventive Medicine</font><br>
<font face="arial" size=2>900 N.E. 10th Street</font><br>
<font face="arial" size=2>Oklahoma City, OK 73104</font><br>
<font face="arial" size=2> </font><br>
<font face="arial" size=2>Phone: (405) 271-8000 ext.1-32208</font><br>
<font face="arial" size=2>Fax: (405) 271-2784</font><br><br>
<hr>
<font face="tahoma" size=2><b>From:</b> <a href="mailto:owner-ag-tech@mcs.anl.gov">owner-ag-tech@mcs.anl.gov</a> on behalf of George Estes<br>
<b>Sent:</b> Tue 9/11/2007 9:00 AM<br>
<b>To:</b> <a href="mailto:ag-tech@mcs.anl.gov">ag-tech@mcs.anl.gov</a><br>
<b>Subject:</b> [AG-TECH] NAT and bridge traffic<br>
</font><br>
<font size=2>Hello,<br><br>
Could someone with experience in this area tell me the issues/problems with receiving traffic from a bridge server if I'm behind a NAT. I've looked through the ag-tech mailing list and there's talk of problems but I can't find specifics.<br><br>
Thanks,<br>
George</font></blockquote></blockquote></blockquote></blockquote></html>