topic Re: NTLM Authorization issues in ArcGIS REST APIs and Services Questions https://community.esri.com/t5/arcgis-rest-apis-and-services-questions/ntlm-authorization-issues/m-p/314491#M1545 <HTML><HEAD></HEAD><BODY><SPAN>David, </SPAN><BR /><BR /><SPAN>&nbsp;&nbsp; Can you please provide a few more pieces of information?&nbsp; First, have you enabled security on your services?&nbsp; If so, please let us know what type.&nbsp; Second, how are you accessing the service (through a firewall/DMZ, or internally). Finally, what is your local security policy setting for Network security: LAN Manager authentication level?&nbsp; We recommend that it be set to "Send LM and NTLM only". </SPAN><BR /><BR /><SPAN>Thanks, </SPAN><BR /><SPAN>Eric Miller</SPAN><BR /><SPAN>Esri Product Engineer</SPAN></BODY></HTML> Tue, 16 Nov 2010 15:38:24 GMT EricMiller1 2010-11-16T15:38:24Z NTLM Authorization issues https://community.esri.com/t5/arcgis-rest-apis-and-services-questions/ntlm-authorization-issues/m-p/314490#M1544 <HTML><HEAD></HEAD><BODY><SPAN>Hi, I am making calls to WCF services on IIS7. After I make a call using a REST call from the ArcGISDynamicMapServiceLayer Map Service (esri.arcgis.client.dll) I get an NTLM authorization error to any future WCF calls. Do you have any suggestions on how I can get around this?&nbsp; Looking at Fiddler it seems like the Map Service is removing the NTLM data. Thank you in advance for any suggestions.</SPAN><BR /><BR /><SPAN>David</SPAN></BODY></HTML> Tue, 09 Nov 2010 18:58:02 GMT https://community.esri.com/t5/arcgis-rest-apis-and-services-questions/ntlm-authorization-issues/m-p/314490#M1544 DavidStreet 2010-11-09T18:58:02Z Re: NTLM Authorization issues https://community.esri.com/t5/arcgis-rest-apis-and-services-questions/ntlm-authorization-issues/m-p/314491#M1545 <HTML><HEAD></HEAD><BODY><SPAN>David, </SPAN><BR /><BR /><SPAN>&nbsp;&nbsp; Can you please provide a few more pieces of information?&nbsp; First, have you enabled security on your services?&nbsp; If so, please let us know what type.&nbsp; Second, how are you accessing the service (through a firewall/DMZ, or internally). Finally, what is your local security policy setting for Network security: LAN Manager authentication level?&nbsp; We recommend that it be set to "Send LM and NTLM only". </SPAN><BR /><BR /><SPAN>Thanks, </SPAN><BR /><SPAN>Eric Miller</SPAN><BR /><SPAN>Esri Product Engineer</SPAN></BODY></HTML> Tue, 16 Nov 2010 15:38:24 GMT https://community.esri.com/t5/arcgis-rest-apis-and-services-questions/ntlm-authorization-issues/m-p/314491#M1545 EricMiller1 2010-11-16T15:38:24Z