RE: 401.2 Errors



Robert,

Thanks for your reply. Here are my responses to your questions .....

1. Do the users have the same problem visiting other websites such as RWW
and OWA?

With the tick box "bypass proxy server" UNTICKED, I am unable to access
sites such as http://servername/exchange and http://servername/remote. For
the OWA site I got an error about the certificate, and when I selected to
continue anyway I got a pop up box asking me to authenticate? I am unable to
access these same sites with the "bypass proxy server" TICKED also.

2. What the version on the IE on Windows 2000 clients?

They are on a mixture of IE5.01 and IE6. I actually updated one of the
clients to IE6 and it seemed to resolve the 401.2 error. However, again, the
only way to get the client onto the Intranet was by UNTICKING the "bypass
proxy server" box. Which is not what I used to have set.

3. What the detail error message in IE brewer when you check Bypass proxy
server for local addresses?

With the "bypass prpxy server" option TICKED (as it always was), the basic
"internet explorer cannot display the webpage" appears. No specific error
code is given.

4. Ping comanyweb, does the result point to the SBS internal Nic's IP
address"

When I ping companyweb from a client it is resolved to the SBS internal IP
address yes.

5. What's the version of SBS server?

It is an SBS 2003 Server with SP1

Please take the following steps to see if the problem can be resolved:

Step 1: Please take your time to rerun CEICW wizard. This wizard helps to
configure network and website correctly.

To do this:
1. Click Start, click Server Management. Click To Do List and then click
"Connect to the Internet". Click Next, and go through the Internet option.
2. Select Enable firewall and click Next.
3. On the Web Services Configuration page shows, select item according to
your enviroment. Click Next.
4. On the Web Server Certificate page shows. Select "Create a new Web
server certificate", and type your FQDN (mail.domain.com) in the "Web
server name" text box. Click Next.

IMPORTANT: The FQDN that you type in the "Web server name" box must be the
same name that you use to connect to the Web site from the Internet. For
example, if the URL that you use to connect to the RWW is
https://server.contoso.com/remote, type "server.contoso.com" (without the
quotation marks) in the "Web server name" box. If you use
http://ipaddress/remote to access RWW, type the public IP address in the
"Web server name".

5. Go through the steps to finish the wizard.

For more information, please refer to:
825763 How to configure Internet access in Windows Small Business Server
2003
http://support.microsoft.com/?id=825763

I re-ran the CEICW again and selected to create a new Web Certificate. This
was called servername.domainname.co.uk. I then re-tried getting onto
http://companyweb with the "bypass proxy server" TICKED and got the same IE
error page. I can still only acces the Intranet with the option UNTICKED. I
also tried to access OWA but the same problems were apparent.

Step 2: Please change the IE setting:

1. Open IE brower.
2. Click Tools->Internet Options->Local intranet->Custom level.
3. Click Automatic logon with current user name and password.
4. Click OK.
5. Click Sites and then click Advanded.
6. Input http://companyweb and click OK three times.

I have set these options as specified on my own IE settings.

Step 3: Configure proxy server settings for the Web browser

1. Start Internet Explorer.
2. On the Tools menu, click Internet Options, and then click the
Connections tab.
3. In the Dial-up and Virtual Private Network settings list, click the
connection that you want to configure, and then click Settings.
4. Under Proxy Server, click Advanced.
5. In the Exceptions box, type the URL http://companyweb.
6. Click OK, click OK, and then click OK.

I made these changes on my own IE settings also. The only difference was
that I have no dial up connections listed since I am on a LAN. So I added the
http://companyweb exception under LAN settings. After making these changes
though and trying to access http://companyweb I was unable to get the page to
load with the "bypass the proxy server" option TICKED or UNTICKED. Therefore,
these new settings have resulted in my IE now not being able to load the
Intranet at all.

For more information, please refer to:

You receive a "You are not authorized to view this page" error message when
you connect to the SharePoint Central Administration page in Windows
SharePoint Services
http://support.microsoft.com/?ID=829065

If the problem persists, please help me collect the following information
for further research:

1. Collect IIS Log:
1) On Exchange Serves, open IIS MMC, right click Default Web Site and then
click Properties.
2) Click Website tab and then check Enable loggin
3) Stop the Default Website and RENAME the existing IIS log files under
C:\WINDOWS\system32\LogFiles\W3SVC1.
4) Restart the Default Website and reproduce the problem, which will
generate new IIS log file with the exact error.
5). Go to the following folder on Exchange Server:
C:\WINDOWS\system32\LogFiles\W3SVC

Logging was already enabled on the IIS Default Web Site. I have replicated
the problem on a client but I cannot see the Log File showing it at all.
Since there are lots of log files, I'm unsure which one to send you here.

2.Collect IIS Metabase
1) On Exchange Server, install .NET Framework Version 1.1:
http://www.microsoft.com/downloads/details.aspx?FamilyID=262d25e3-f589-4842-
8157-034d1e7cf3a3&DisplayLang=en.
2) Install MBExplorer by installing IIS 6 Resource Kit Tools:
http://www.microsoft.com/downloads/details.aspx?FamilyId=56FC92EE-A71A-4C73-
B628-ADE629C89499&displaylang=en.
3) Once it is installed, access it from Start, Programs, IIS Resources,
Metabase Explorer.
4) In the left pane, right click ''LM'' (under your server computer name)
to choose ''Export to file'', and then save it as IIS.mbk.
5) Compress this mbk file and send it to me for analysis. Please let me
know the password if you set on this iis mbk file.

I already have .NET Framework 1.1 on the SBS server but I downloaded the
other file you mentioned IIS 6.0 Resource Kit. However, when I try to run
this on the SBS server I get "Windows cannot access the specified path .... "
even if I try running it from the desktop??!!

Please send the information to v-robeli@xxxxxxxxxxxxx with subject:
38925791-401.2 Errors.

For your question 1, by default the option by pass proxy for local address
is selected, this reduces the network traffic from intranet to SBS server.
The problem is very strange and we are troublingshooting this.

I am looking forward to here from you.

If you need further assistance, please don't hesitate to let me know.

Best regards,

Robert Li(MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

Hope the above information helps.

Thanks.
.



Relevant Pages

  • [REVS] NTLM HTTP Authentication is Insecure By Design
    ... in front of a web server, and that proxy server shares a single TCP ... These are attacks that make use of non-RFC HTTP requests (HTTP Request ... the authentication is associated with the ...
    (Securiteam)
  • RE: 401.2 Errors
    ... What's the version of SBS server? ... and go through the Internet option. ... Under Proxy Server, click Advanced. ... Collect IIS Log: ...
    (microsoft.public.windows.server.sbs)
  • Re: Microsoft Security Bulletin MS02-027 UPDATE: Patch now available
    ... Unchecked Buffer in Gopher Protocol Handler Can Run Code ... Internet Explorer, Proxy Server, Internet Security and ... attacker to attempt to exploit this flaw by mounting a buffer overrun attack ...
    (microsoft.public.security)
  • RE: freebsd-questions Digest, Vol 52, Issue 3
    ... To subscribe or unsubscribe via the World Wide Web, ... bypassing a proxy server ... > As some of you may recall, I'm engaged in an ongoing saga trying to set> up a FreeBSD machine on a school's network. ...
    (freebsd-questions)
  • RE: web browsing in production environment - a journey through comfort and security
    ... For example an LDAP server misconfigured LDAP injection is sensitive to. ... And what about turning off the Group Policies, ... a security policy and ceñirte it. ... - a squid proxy server ...
    (Security-Basics)