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Replacing ISA 2006 with SonicWall NSA 2400

Posted on 2010-11-30
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Last Modified: 2012-05-10
Hi Experts,
We currently have an ISA server with one internal NIC and one external NIC.  Behind the ISA we have an Exchange 2003 Front End server configured with only an internal NIC and a Back End server also configured with an internal NIC.  The ISA is the proxy to the internet and OWA is published on it as well for both internal and external users.  My plan is to remove the ISA server completely and replace it with the SonicWall NSA 2400, obviously the address of the internal NIC of the SonicWall will be the same as that of the internal NIC of the ISA being replaced, my dilema is that, should I now give the external NIC of the SonicWall a new public address and assign the external NIC address of my old ISA server to the secondary NIC of my Exchange Front End server ?.  Because right now "mail.mydomain.com" resolves to the external NIC of my ISA server
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Question by:lanreo
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5 Comments
 
LVL 33

Expert Comment

by:digitap
ID: 34238609
i don't believe so.  simply remove the ISA, configure the WAN interface with the external NIC IP of the ISA and the LAN interface of the internal NIC of the ISA.  Run the public server wizard to configure your Exchange port forwarding and use the IP the ISA used.  you shouldn't have to change anything on the Exchange Front End.  if it doesn't work, throw the ISA back in and review your sonicwall settings.

Here are a couple of KB articles.

opening ports manually:

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=7497

using the public server wizard:

https://www.fuzeqna.com/sonicwallkb/consumer/kbdetail.asp?kbid=7027
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Author Comment

by:lanreo
ID: 34240999
Thanks for the prompt response, I'll be installing an Aventail EX6000 as well for remote connectivity, I've been searching for a guide on installing this with the NSA 2400 but could not for instructions anywhere.  Would you have a link to where I can get instructions to set it up?
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LVL 33

Accepted Solution

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digitap earned 2000 total points
ID: 34242761
I've never installed that product.  I've installed the SSL-VPN appliances.  Either way, here's a couple of links.

SonicWALL Aventail 10.5.2 Getting Started Guide

http://www.sonicwall.com/us/support/230_17045.html

SonicWALL Aventail 10.5.2 Installation and Administration Guide

http://www.sonicwall.com/downloads/SonicWALL_Aventail_10.5.2_Installation_and_Administration_Guide.pdf



If you want to see the whole collection, go to the link below and review the links for Sonicwall Aventail.

http://www.sonicwall.com/us/support/289.html#heading_3790
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Author Closing Comment

by:lanreo
ID: 34295477
Thank you very much for the prompt support !!!
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LVL 33

Expert Comment

by:digitap
ID: 34295503
you're welcome!  thanks for the points and good luck with your install.
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