# Connection between APM-Server and Elasticsearch seems not to be established **URL:** \ **Category:** APM\ **Tags:** server\ **Created:** [February 24, 2025, 6:33am UTC](https://discuss.elastic.co/t/connection-between-apm-server-and-elasticsearch-seems-not-to-be-established/374919 "2025-02-24T06:33:17Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![dhwo0787](https://avatars.discourse-cdn.com/v4/letter/d/ec9cab/32.png) [@dhwo0787](https://discuss.elastic.co/u/dhwo0787)\ **Post date:** [February 24, 2025, 6:33am UTC](https://discuss.elastic.co/t/connection-between-apm-server-and-elasticsearch-seems-not-to-be-established/374919/1 "2025-02-24T06:33:17Z")
elasticsearch and kibana setting is done. But, APM-Server is getting an error when it starts. error : 1. unable to authenticate user [kinana\_system] for REST request 2. API key: unable to find apikey with id elastic 3. precondition failed: error querying cluster\_uuid: status\_code=401 I tried with elastic / kibana\_system / API\_keys. But it cannot access with es. Of course, the password that i use can log into kibana website. is it wrong about Self-signed Certification? Please help me...... > apm-server.yml : > apm-server: > host: "0.0.0.0:8200" > output.elasticsearch: > hosts: ["0.0.0.0"] > protocol: "https" > username: "kinana\_system" > password: "classified" > ssl.verification\_mode: none > elasticsearch.yml : > network.host: 0.0.0.0 > http.port: 9200 > xpack.security.enabled: true > xpack.security.enrollment.enabled: true > xpack.security.http.ssl: > enabled: true > keystore.path: certs/http.p12 > xpack.security.transport.ssl: > enabled: true > verification\_mode: certificate > keystore.path: certs/transport.p12 > truststore.path: certs/transport.p12 > cluster.initial\_master\_nodes: ["SSVELA1V"] > http.host: 0.0.0.0 > xpack.security.authc.api\_key.enabled: true