In Server.conf change the parameter below to * to enable all the connections please check the details in the following link https://docs.splunk.com/Documentation/Splunk/7.3.0/Admin/Serverconf crossOriginSharingPolicy = ... * List of the HTTP Origins for which to return Access-Control-Allow-* (CORS) headers. * These headers tell browsers that web applications are trusted at those sites to make requests to the REST interface. * The origin is passed as a URL without a path component (for example "https://app.example.com:8000"). * This setting can take a list of acceptable origins, separated by spaces and/or commas. * Each origin can also contain wildcards for any part. Examples: ://app.example.com: (either HTTP or HTTPS on any port) https://.example.com (any host under example.com, including example.com itself) * An address can be prefixed with a '!' to negate the match, with the first matching origin taking precedence. For example, "!://evil.example.com:* ://.example.com:" to not avoid matching one host in a domain * A single "" can also be used to match all origins * No default. ... View more