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Configuring HTTP Client in HQ

HTTP Client provides a set of configuration options needed for accessing external resources via the HTTP protocol. This requires configuration of a forward proxy, authentication on an ArcGIS Server and Portal or HTTPS settings. HTTP Client provides full support for HTTP over Secure Sockets Layer (SSL).


These settings determine which SSL certificates Voyager accepts. There are three options:

  • Default Settings 
    These are the standard settings provided by Apache HttpClient
  • Trust Any SSL
    Allows certificates from any third-party SSL Socket Factory
  • Trust Self Signed SSL
    Allows self-signed certificates from any third-party SSL Socket Factory


  • Choose whether or not to use the System proxy settings. If you do not use the System settings you can explicitly set up a proxy host or IP address and a proxy port number. 
  • You can also choose Use automatic proxy configuration and specify the URL with the proxy configuration script (usually .pac script).
  • Choose Custom Settings to customize configuration, including Bypass settings.


Choose an authentication scheme to support:

  • Support NTLM
    This option will restrict security to the NTLM protocol and not the stronger Kerberos protocol
  • Support Negotiate 
    This option selects either Kerberos or NTLM, and defaults to NTLM if Kerberos is unavailable

Adding Authentication

Click Add Authentication to add a domain to authenticate.


Enter the URL for the Server.


Select a value for the Authentication scheme:

  • Basic - uses unencrypted username/password
  • NTLM - uses the NTLM authentication scheme
  • Negotiate - uses the either the Kerberos or NTLM authentication scheme


  • For Kerberos schemes, the Realm is created by an Administrator, and is roughly equivalent to a Windows Workgroup.  The Realm defines all of the resources that Kerberos manages.  Both your host and the target server must be in the same Realm.
  • For NTLM, there is no equivalent to the Kerberos Realm.  Instead, it uses the domain name of the server in place of the Realm.

Use System Credentials

Select the Use System Credentials to use the NTLM/Negotiate system settings.


Select the Preemptive option to enable the preemptive authentication.


Use this tool to test your HTTP Client configuration and verify if HQ is able to access external web services.  

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