Solved

ISA Server, Exchange, DMZ-Intranet

Posted on 2002-03-25
4
7,127 Views
Last Modified: 2013-11-16
I have a ISA Configuration looking like this:
Internet - ISA1 - DMZ - ISA2 - Intranet

The DMZ and Intranet are using 192.168.x.xxx addresses.

On the intranet is a Exchange Server 2000 with the "integrated" IIS  web
mail functionality.

I want to read the web mail from internet and therfore trying to publish
the exchange webserver via ISA2 and publish the ISA2 via ISA1. Since
exchange web mail relies on hostname I need to push the hostname all the
way through both ISA servers.

However, doing this I get the following error message when i browse this
page from the internet:
403 Forbidden - The server denies the specified Uniform Resource Locator
(URL). Contact the server administrator. (12202)
Internet Security and Acceleration Server

Any tips or ideas?
0
Comment
Question by:campell
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 14

Accepted Solution

by:
chris_calabrese earned 100 total points
ID: 6897349
Yes, don't do this!  Instead go with a full VPN setup and let your users access the actual internal mail server, among other things.

Yes, this is more work.  But it's also more powerful and likely more secure.
0
 
LVL 4

Assisted Solution

by:anzen
anzen earned 100 total points
ID: 6954271

You're breaking a lot of security rules, don't do it, the only safe way I see is moving the exchange server to the DMZ where it could be published using the "outer" ISA; the intranet users will then access it through the "inner" ISA server; this way if someone breaks into your mail server he won't be able to compromise your intranet


0
 
LVL 4

Expert Comment

by:anzen
ID: 6954277

Another note: it would be better to have the DMZ on a completely different subnet; i.e. if the intranet is using a 192.168.x.y subnet you could use a 10.x.y.z for the DMZ, this way if someone "penetrates" the DMZ he won't have a glue about the internal network addressing scheme

0
 
LVL 5

Expert Comment

by:zenlion420
ID: 9709111
Hey people,

No comment has been added in roughly 1 year, so it's time to clean up this TA.
I will leave a recommendation in the Cleanup topic area that this question
be PAQ'd and pts split between chris_calabrese and anzen.
Please leave any comments here within the next seven days.

PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!

Zenlion420
EE Page Editor
0

Featured Post

Get 15 Days FREE Full-Featured Trial

Benefit from a mission critical IT monitoring with Monitis Premium or get it FREE for your entry level monitoring needs.
-Over 200,000 users
-More than 300,000 websites monitored
-Used in 197 countries
-Recommended by 98% of users

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Email attacks are the most common methods for initiating ransomware and phishing scams. Attackers want you to open an infected attachment or click a malicious link, and unwittingly download malware to your machine. Here are 7 ways you can stay safe.
Recovering from what the press called "the largest-ever cyber-attack", IT departments worldwide are discussing ways to defend against this in the future. In this process, many people are looking for immediate actions while, instead, they need to tho…
Sending a Secure fax is easy with eFax Corporate (http://www.enterprise.efax.com). First, just open a new email message. In the To field, type your recipient's fax number @efaxsend.com. You can even send a secure international fax — just include t…
Nobody understands Phishing better than an anti-spam company. That’s why we are providing Phishing Awareness Training to our customers. According to a report by Verizon, only 3% of targeted users report malicious emails to management. With compan…

726 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question