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9.0

DNS Redirect for webiste in DMZ \ Cisco ASA5510?

Asked by stuart100 in Cisco PIX Firewall, Domain Name Service (DNS), Network Design & Methodology

Tags: Microsoft, DNS, 2003, Webserver/site internal DNS, Cisco, ASA5510, Weserver/site DMZ translation

Good Morning,

I am going to do my best to explain the issue clearly.

We have an ASA5510 Cisco Firewall.  On that firewall we have three interfaces. Outside, Inside, and DMZ.

Outside: 64.8.98.0
Inside: 172.18.0.0
DMS: 192.168.251.0

We currently have a FTP site that all of our internal and external employees\clients use.  It is on a web server on the DMZ.  The web server is a standalone Windows 2000 server the only thing loaded is IIS for the FTP site.

The website is DMZ address is 192.168.251.11 and the outside address is 64.8.98.53 and there is a static in the firewall that takes care of the outside to DMZ translation. So when people outside hit ftp://www.ourdoaminname.com they go to 64.8.98.53 and get prompt with a login box.

Outside access to the FTP site works just fine!!!!!!

The real issue is inside access.  When an internal user goes to ftp://www.ourdoaminname.com it never connects and ends up in error.  If you ping ftp://www.ourdoaminname.com you get the outside IP address not the address on the DMZ.  Now if I go to ftp://192.168.251.11 from inside I get the login prompt and I can get right into the site.  I know that our internal folks could just use the IP addresses but I have the extreme need to make this seamless.  I would like everyone to look and work the same internal and external.  Plus when I change the site later and I can just change DNS as opposed to IP addresses on 80 machines.

Is there any way to use my internal DNS server to redirect my clients to the DMZ address if so how do I do it?  Secondly if not is there something the firewall can do to perform the redirect or translation?

Thanks

John





We own a domain name name for
[+][-]09/29/08 05:18 AM, ID: 22595546Accepted Solution

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About this solution

Zones: Cisco PIX Firewall, Domain Name Service (DNS), Network Design & Methodology
Tags: Microsoft, DNS, 2003, Webserver/site internal DNS, Cisco, ASA5510, Weserver/site DMZ translation
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Solution Provided By: Chris-Dent
Participating Experts: 2
Solution Grade: A
 
[+][-]09/29/08 05:15 AM, ID: 22595530Expert Comment

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[+][-]09/29/08 05:17 AM, ID: 22595539Expert Comment

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[+][-]09/29/08 06:06 AM, ID: 22595937Expert Comment

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[+][-]09/30/08 02:35 AM, ID: 22603748Expert Comment

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