Cover Letter For Visual Communication

Reporting Services Reporting Services HTTP 401 (Unauthorized) in cluster environment

When you install Reporting Services in a NLB cluster using a virtual name to access it this can cause them to show the error HTTP 401 (Unauthorized) or the browser is a loop asking for user credentials.

To solve this problem you have two options:

1. Disable LoopBackCheck this is done in HKEY_LOCAL_MACHINE \\ SYSTEM \\ CurrentControlSet \\ Control \\ Lsa and create a DWORD with the name DisableLoopbackCheck with a value of 1, this fixes the problem

Start Registry Editor (Regedt32.exe).

Locate the following registry key and click on it:

HKEY_LOCAL_MACHINE \\ System \\ CurrentControlSet \\ Services \\ LanmanServer \\ Parameters

On the Edit menu, click Add Value and add the following registry value:

Value Name: DisableStrictNameChecking
Data Type: REG_DWORD
Base: Decimal Value
: 1

In Registry Editor, locate the following key and then click it:

HKEY_LOCAL_MACHINE \\ SYSTEM \\ CurrentControlSet \\ Control \\ Lsa

Click the right mouse button (mouse) Lsa, point to New, and then click DWORD Value. Write

DisableLoopbackCheck and press Enter.

Right click DisableLoopbackCheck right-click and then click Modify.

In the Value data box, type 1 and click OK.

Close the Registry Editor and restart your computer.

2. Specify the name of the host headers, this is a preferred method.

Start Registry Editor (Regedt32.exe).

Locate the following registry key and click on it:

HKEY_LOCAL_MACHINE \\ System \\ CurrentControlSet \\ Services \\ LanmanServer \\ Parameters

On the Edit menu, click Add Value and add the following registry value:

Value Name: DisableStrictNameChecking
Data Type: REG_DWORD
Base: Decimal Value
: 1

In Registry Editor, locate the following key and click on it:

HKEY_LOCAL_MACHINE \\ SYSTEM \\ CurrentControlSet \\ Control \\ Lsa \\ MSV1_0

Click the right mouse button MSV1_0 selected New, and then click Multi-String Value. Write

BackConnectionHostNames and press ENTER.

Click the right mouse button BackConnectionHostNames, and then click Modify.

In the Value data box, type the host name or virtual host name for sites that are on the local computer, and then click OK.