Sorry about typo's. and it is supposed to say "You can also"
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Question
DNS Redirect for webiste in DMZ \ Cisco ASA5510?
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.co
Outside access to the FTP site works just fine!!!!!!
The real issue is inside access. When an internal user goes to ftp://www.ourdoaminname.co
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
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Answers
> 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?
Sure, that's no problem at all.
You have two choices now. Which you use depends on how you want to scope the change. I suspect the first of these will be most appropriate:
1. Open the DNS Console (from Administrative Tools)
2. Expand Forward Lookup Zones
3. Create a new zone
4. Type is either Primary or Primary and Active Directory Integrated
5. Replication Scope can remain default
6. Zone Name should be the name of the host, so: www.yourdomain.com
7. Select "Do not allow dynamic updates"
8. Finish
In step 6, naming the zone in this manner means we do not have to maintain any other public records beneath yourdomain.com unless we really need to.
Then you need to add a record so the name resolves:
1. Select the new zone (www.yourdomain.com)
2. Right click and select "New Host (A)..."
3. Leave the Name Blank
4. Enter the IP Address
Finally, it just needs testing.
On a client machine, run:
ipconfig /flushdns
Then:
nslookup www.yourdomain.com
and
ping www.yourdomain.com
It should reply with the record we just added.
HTH
Chris
Chris-Dent:
Crap I was so close. I made the Pri forward lookup like you described yesterday but when I made the Host record I did not leave the name blank. It worked like a charm enjoy the points and thanks for not tossing down and quick answer without reading what I was looking for.
Dbrookfield:
Did you read the part in my question where I said I did not want to go around to 80 machines to change IP addresses? The host file would have caused me to do the same thing...even if I just pushed it out to each machine it would be way more work than just changing the record on the DNS server.
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by: DBrookfieldPosted on 2008-09-29 at 05:15:44ID: 22595530
The problem you have is you can't go out and back in through the same firewall router.
I've no idea how may people yo have, but the easy way to do this would be to edit your hosts file. You can edit your DNS on your domain, basically you are trying to override the DNS they are getting for your FTP.
I can't remember how you would do this in windows DNS, but in your hosts file all you need do is put
192.168.251.11 ftp://www.ourdoaminname.co
And that would override what they are getting from DNS, if you see what I mean?