How to Verify That RPC Proxy Server Has Basic Authentication Configured

 

This topic helps you troubleshoot an unsuccessful RPC over HTTP connection. This article explains how to verify that the RPC proxy server is configured to use basic authentication.

If your clients are repeatedly prompted for their credentials, verify that the RPC proxy server is configured to use basic authentication. Follow steps below.

Note

It is recommended that you use Basic authentication over Windows Integrated Authentication (NTLM) because of two reasons. First, RPC over HTTP currently supports only NTLM – it doesn’t support Kerberos. Second, if there is an HTTP Proxy or a firewall between the RPC over HTTP client and the RPC Proxy, which inserts the via pragma in the HTTP header, NTLM authentication will not work. For more information see, RPC over HTTP Deployment Recommendations.

Procedure

To verify that RPC proxy virtual server is configured to use basic authentication

1. Start the Internet Information Services (IIS) Manager.

2. Expand computername (local computer), expand Web Sites, expand the Web site where the Rpc application is configured, right-click Rpc, and then click Properties.

3. Click the Directory Security tab, and then click Edit under Authentication and access control.

4. Click to clear the Enable anonymous access check box if it is selected.

5. Click to select the Basic authentication (password is sent in clear text) check box. You receive the following message:

   The authentication option you have selected results in passwords being transmitted over the network without data encryption. Someone attempting to compromise your system security could use a protocol analyzer to examine user passwords during the authentication process. For more detail on user authentication, consult the online help. This warning does not apply to HTTPS (orSSL) connections.

   Are you sure you want to continue?

   Note

   In this message, the word "HTTPS (orSSL)" is a misspelling for the words "HTTPS (or SSL)."

   Click Yes.

6. Click OK two times.

For More Information

• For more information on Basic and Integrated Windows authentication, see RPC over HTTP Authentication and Security.

• For information about deploying RPC over HTTP in different Exchange Server 2003 scenarios, see Deployment Scenarios for RPC over HTTP.

• For more information on troubleshooting RPC over HTTP communications, see the following topics:

  • How to Verify That RPC over HTTP Support Is Installed

  • How to Verify That World Wide Web Publishing Service Is Running

  • How to Verify That SSL Certificate Is Installed on RPC Proxy Server

  • How to Verify RPC Virtual Directory Configuration

  • How to Verify That RPC Proxy Server Extension Is Loading Properly

  • How to Verify Client Computer Configuration

  • How to Verify Exchange Server 2003 Port Configuration