RE: ISA SSL Complicated configuration Problems

  • From: "Thomas W. Shinder" <tshinder@xxxxxxxxxxxxxxxxxx>
  • To: "[ISAserver.org Discussion List]" <isalist@xxxxxxxxxxxxx>
  • Date: Thu, 14 Feb 2002 13:34:58 -0600

Hi Russ,

Interesting! This is what it used to say:

SYMPTOMS
When you try to connect to a site that is hosted on the Internet
Information Server (IIS) 5.0 through the HTTPS protocol, you may receive
the following error message: 

The page cannot be displayed. 
... 
... 
Cannot find server or DNS Error. 



CAUSE
This problem occurs because, on a standard installation, the default Web
site is always bound to the Internet Protocol (IP) address and the port
combination of "All Unassigned:443" for Secure Sockets Layer (SSL), even
though you do not have a certificate bound to the site. 

This problem can occur when another Web site on the server has a
certificate bound to it and is listening on the IP address and port
combination of "All Unassigned:443" for SSL requests. As a result, when
a request comes in for a page over HTTPS, the request goes to the
default Web site instead of the intended site because the default Web
site is also listening on port 443 on "All Unassigned". In addition,
because the default Web site does not have an SSL certificate, it
displays the "Page cannot be displayed" error message. 



RESOLUTION
To resolve this problem, remove the binding of port 443 from the default
Web site to allow the intended site to respond to requests that come
over HTTPS. To do this, follow these steps: 

On the server, at a command prompt, type the following command to change
to the Adminscripts directory: 


cd c:\inetpub\adminscripts 
At a command prompt, type the following command to look at the SSL
binding for the default Web site: 
adsutil get w3svc/1/SecureBindings 
This should return the following output (or similar): 


SecureBindings                  : (LIST) ":443" 
At a command prompt, type the following command to set the SSL binding
to null: 


adsutil set w3svc/1/SecureBindings "" 
In the Microsoft Management Console (MMC), right-click the computer
name, and then click Restart IIS . The page should be displayed
properly, and the site should be accessible without any problems. 





MORE INFORMATION
For additional information about using SSL with IIS, click the article
numbers below to view the articles in the Microsoft Knowledge Base: 

Q260096 Page Cannot Be Displayed When You Connect Through SSL 
Q187504 IIS: HTTP 1.1 Host Headers Not Supported When Using SSL 
Q265847 Error Message: The Page Cannot Be Displayed . . . Cannot Find
Server or DNS Error 
Q228836 Installing a New Certificate with Certificate Wizard for Use in
SSL/TLS

-----Original Message-----
From: Russ Highton Jr. [mailto:RussH@xxxxxxxxxx] 
Sent: Thursday, February 14, 2002 1:32 PM
To: [ISAserver.org Discussion List]
Subject: [isalist] RE: ISA SSL Complicated configuration Problems

http://www.ISAserver.org


Tom, 

All in good fun...I'll be able to help you more when your info finally
pays off $$$$ if you know what I mean... not quite there yet.  ;-)

One problem, Q290391 does not exist.  :-(  At least not on google or
msdn.microsoft.com


Russ


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