11004 DNS issue

  • Thread starter Thread starter Horace
  • Start date Start date
H

Horace

Hello

We have been getting some DNS server problems (specifically 11004) when
people go to our web site (which is hosted in a Windows 2000 Server
machine). The message in the browser is list below. This only happens at
one or two client locations (who have a Windows Server 2003 gateway/ISA
server) - all other places where people access the site (all over the
world), the problem doesn't exist. Hence it seems like it's at the client's
end - perhaps the gateway/ISA server. Another thing to note is that we have
a number of subdomain names (6) along with the original domain - strange
thing is if the client (who has a DNS problem) tries on one of the
combinations and fails s/he can quite often get to the site using one of the
other subdomains.

Any ideas ?

Many thanks
Phil

The Web site cannot be found
The Web site you are looking for is unavailable due to its identification
configuration settings.

Please try the following:

o Click the Refresh button, or try again later.

o If you typed the page address in the Address bar, make sure that it
is spelled correctly.

o Click the Back button to try another link.

11004 - Host not found
Internet Security and Acceleration Server

Technical Information (for support personnel)

o Background:
This error indicates that the gateway could not find the IP address of the
Web site you are trying to access.

o ISA Server: bsemisa01.bsem.info
Via:

Time: 19/08/2004 4:27:20 AM GMT
 
In
Horace said:
Hello

We have been getting some DNS server problems
(specifically 11004) when people go to our web site
(which is hosted in a Windows 2000 Server machine). The
message in the browser is list below. This only happens
at one or two client locations (who have a Windows Server
2003 gateway/ISA server) - all other places where people
access the site (all over the world), the problem doesn't
exist. Hence it seems like it's at the client's end -
perhaps the gateway/ISA server. Another thing to note is
that we have a number of subdomain names (6) along with
the original domain - strange thing is if the client (who
has a DNS problem) tries on one of the combinations and
fails s/he can quite often get to the site using one of
the other subdomains.

Any ideas ?

Many thanks
Phil

The Web site cannot be found
The Web site you are looking for is unavailable due to
its identification configuration settings.

Please try the following:

o Click the Refresh button, or try again later.

o If you typed the page address in the Address
bar, make sure that it is spelled correctly.

o Click the Back button to try another link.

11004 - Host not found
Internet Security and Acceleration Server

Technical Information (for support personnel)

o Background:
This error indicates that the gateway could not find the
IP address of the Web site you are trying to access.

o ISA Server: bsemisa01.bsem.info
Via:

Time: 19/08/2004 4:27:20 AM GMT
Click to expand...

This is most surely an ISA configuration issue, I have cross posted back to
ISA group where possible someone can tell you what the problem is.
 
In
Horace said:
Hello

We have been getting some DNS server problems (specifically 11004)
when people go to our web site (which is hosted in a Windows 2000
Server machine). The message in the browser is list below. This
only happens at one or two client locations (who have a Windows
Server 2003 gateway/ISA server) - all other places where people
access the site (all over the world), the problem doesn't exist.
Hence it seems like it's at the client's end - perhaps the
gateway/ISA server. Another thing to note is that we have a number
of subdomain names (6) along with the original domain - strange thing
is if the client (who has a DNS problem) tries on one of the
combinations and fails s/he can quite often get to the site using one
of the other subdomains.

Any ideas ?

Many thanks
Phil

The Web site cannot be found
The Web site you are looking for is unavailable due to its
identification configuration settings.

Please try the following:

o Click the Refresh button, or try again later.

o If you typed the page address in the Address bar, make sure
that it is spelled correctly.

o Click the Back button to try another link.

11004 - Host not found
Internet Security and Acceleration Server

Technical Information (for support personnel)

o Background:
This error indicates that the gateway could not find the IP address
of the Web site you are trying to access.

o ISA Server: bsemisa01.bsem.info
Via:

Time: 19/08/2004 4:27:20 AM GMT
Click to expand...

Actually we'll need more info on your webserver configuration to figure this
out, but let's see what we can do...

The one error that catches my eye says:
The Web site cannot be found
The Web site you are looking for is unavailable due to its
identification configuration settings.
Click to expand...

If this is your website, since you mentioned its on a Windows 2000 server,
and you said the client can connect by chance by using one of the other
domain names hosted on the machine:

Another thing to note is that we have a number
of subdomain names (6) along with the original domain - strange thing
is if the client (who has a DNS problem) tries on one of the
combinations and fails s/he can quite often get to the site using one
of the other subdomains.
Click to expand...

That kind of tells me that the host headers on the webserver for each site
are not configured properly. ISA is trying to connect to the site by the
host header name. That name is used to differentiate each site on the
machine. If not configured properly, it seems that you'll get the results
that you are experiencing.

Are the host headers configured properly? Are one of the sites on the
machine using SSL?

Here's some info on hostheaders:

Using Host Headers to Allow for One I.P Address to Host Multiple Domains:
http://www.4guysfromrolla.com/ASPscripts/PrintPage.asp?REF=/webtech/080200-1.shtml

190008 - HOW TO- Use Host Header Names to Host Multiple Sites from One IP
Address in IIS 5.0:
http://support.microsoft.com/default.aspx?scid=kb;en-us;190008

315982 - HOW TO Configure DNS Records for Your Web Site in Windows 2000:
http://support.microsoft.com/?id=315982

IIS Answers - How to create multiple websites with one IP address:
http://www.iisanswers.com/Top10FAQ/t10-hostheaders.htm

300238 - Error Message- No Web Site Is Configured At This Address When Using
Host Headers:
http://support.microsoft.com/default.aspx?scid=kb;en-us;300238

321650 - How to use SSL and MCMS 2001 on a Web site that has host headers
enabled:
http://support.microsoft.com/default.aspx?scid=kb;en-us;321650

187504 - HTTP 1.1 Host Headers Are Not Supported When You Use SSL:
http://support.microsoft.com/default.aspx?scid=kb;en-us;187504

--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees
and confers no rights.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft Windows MVP - Windows Server - Directory Services

Security Is Like An Onion, It Has Layers
HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.
 
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