SYMPTOMS
When you use a downstream Internet Security and Acceleration (ISA) Server computer that is
chained to an upstream ISA Server array, Secure Sockets Layer (SSL) requests
may not be successful, or authentication prompts may occur on the client. These
problems appear only if all the following conditions are true:
- The upstream array includes at least two member server
nodes.
- The upstream outbound access policy uses user-based or
group-based protocol rules or site and content rules.
- The upstream ISA Server computer or array is configured to
use NTLM authentication for outgoing Web requests.
- Ask unauthenticated users for
identification is not selected on the outgoing Web request listener of
the upstream ISA Server array. For more information about how to configure this
setting, see the "More Information" section.
- The routing rule on the downstream ISA Server computer is
configured to route to the upstream array and has Automatically poll
upstream server for array information enabled. (That is, the header that is sent in a request to the server to enable the CARP protocol and to permit the correct routing is enabled. This header is "array.dll?Get.Info.v2".) For more information about how to configure this setting, see the
"More Information" section.
This issue does not occur when
Ask unauthenticated users
for identification is set for outgoing Web
requests on the upstream ISA Server computer or array. For more
information about how to configure this setting, see the "More Information"
section.
Note If you use the
Automatically poll
upstream server for array information setting as a workaround, you may experience
another issue.
For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
813863
Automatic requests for upstream server information (Get.info.v2) do not succeed when authentication is required in ISA Server
RESOLUTION
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Internet Security and Acceleration Server 2000 service
pack that contains this hotfix.
To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the
Time Zone tab in the Date and Time tool in Control Panel.
Note You must install ISA Server Service Pack 1 before you install
this hotfix.
Date Time Version Size File name
--------------------------------------------------
05-June-2003 10:35 3.0.1200.275 178,448 Mspadmin.exe
05-June-2003 10:35 3.0.1200.275 103,184 Msphlpr.dll
05-June-2003 10:34 3.0.1200.275 391,952 W3proxy.exe
05-June-2003 10:35 3.0.1200.275 299,280 Wspsrv.exe
This fix also applies to the French, German, Spanish, and Japanese
versions of ISA Server.