First of all thank you very much @MattWho for your reply, sorry I have not responded before but I was analyzing everything and doing the appropriate tests and it has worked. Clearly until there is no security in nifi will not connect to anything. I followed the tutorial that marks the web and using the example that is in dockerhub nifi  I created the container correctly. Now there is a new challenge and I think it is between nifi and ldap with respect to user authentication because I do not pass the login screen. admin user password admin and the answer of nifi " Unable to validate the supplied credentials. Please contact the system administrator."  😞 Could you tell me what the problem is, as I have made many configurations that I have read on different websites but none solves the problem.   Thanks in advance  🙂 I leave you the data as a guideline.   Docker-compose.yml     version: '3.3' services: run: container_name: nifi volumes: - 'D:\Proyectos\prueba\code\DevOps-NIFI\certs\localhost:/opt/certs' - 'D:\Proyectos\prueba\code\DevOps-NIFI\conf:/opt/nifi/nifi-current/conf' ports: - '8443:8443' environment: - AUTH=ldap - KEYSTORE_PATH=/opt/certs/keystore.jks - KEYSTORE_TYPE=JKS - KEYSTORE_PASSWORD=PHOLoN27sv5Y+vGJMb8foz9fsMm6tYG+vUfQUX2Pejo - TRUSTSTORE_PATH=/opt/certs/truststore.jks - TRUSTSTORE_PASSWORD=XRIkyNPL3JrPmY9O6ZMbpgQCT2zbOEbvTpm6InXgInU - TRUSTSTORE_TYPE=JKS - 'INITIAL_ADMIN_IDENTITY=cn=admin,dc=example,dc=local' - LDAP_AUTHENTICATION_STRATEGY=SIMPLE - 'LDAP_MANAGER_DN=cn=admin,dc=example,dc=local' - LDAP_MANAGER_PASSWORD=admin - 'LDAP_USER_SEARCH_BASE=dc=example,dc=local' - 'LDAP_USER_SEARCH_FILTER=(cn={0})' - LDAP_IDENTITY_STRATEGY=USE_DN - 'LDAP_URL=ldap://192.168.0.23:389' image: apache/nifi:latest       authorizations.xml     <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <authorizations> <policies> <policy identifier="f99bccd1-a30e-3e4a-98a2-dbc708edc67f" resource="/flow" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="35abdefa-c3db-3275-add7-dd027b2af2df" resource="/data/process-groups/49766c26-0177-1000-96ee-e7e3cd1d2779" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="3818fc5b-9df0-3d11-a291-bc8a018455f1" resource="/data/process-groups/49766c26-0177-1000-96ee-e7e3cd1d2779" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="5cdc6d64-b287-3939-a413-1edea5b1c359" resource="/process-groups/49766c26-0177-1000-96ee-e7e3cd1d2779" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="896bb72a-fd18-3272-89bd-52dd071a6cc6" resource="/process-groups/49766c26-0177-1000-96ee-e7e3cd1d2779" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="b8775bd4-704a-34c6-987b-84f2daf7a515" resource="/restricted-components" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="627410be-1717-35b4-a06f-e9362b89e0b7" resource="/tenants" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="15e4e0bd-cb28-34fd-8587-f8d15162cba5" resource="/tenants" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="ff96062a-fa99-36dc-9942-0f6442ae7212" resource="/policies" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="ad99ea98-3af6-3561-ae27-5bf09e1d969d" resource="/policies" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="2e1015cb-0fed-3005-8e0d-722311f21a03" resource="/controller" action="R"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> <policy identifier="c6322e6c-4cc1-3bcc-91b3-2ed2111674cf" resource="/controller" action="W"> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad"/> </policy> </policies> </authorizations>       users.xml     <?xml version="1.0" encoding="UTF-8" standalone="yes"?> <tenants> <groups/> <users> <user identifier="8e4a8efe-1a6a-3fde-b46e-3f8fa50065ad" identity="cn=admin,dc=example,dc=local"/> </users> </tenants>       authorizers.xml     <userGroupProvider> <identifier>file-user-group-provider</identifier> <class>org.apache.nifi.authorization.FileUserGroupProvider</class> <property name="Users File">./conf/users.xml</property> <property name="Legacy Authorized Users File"></property> <property name="Initial User Identity 1">cn=admin,dc=example,dc=local</property> </userGroupProvider> <accessPolicyProvider> <identifier>file-access-policy-provider</identifier> <class>org.apache.nifi.authorization.FileAccessPolicyProvider</class> <property name="User Group Provider">file-user-group-provider</property> <property name="Authorizations File">./conf/authorizations.xml</property> <property name="Initial Admin Identity">cn=admin,dc=example,dc=local</property> <property name="Legacy Authorized Users File"></property> <property name="Node Identity 1"></property> <property name="Node Group"></property> </accessPolicyProvider> <authorizer> <identifier>managed-authorizer</identifier> <class>org.apache.nifi.authorization.StandardManagedAuthorizer</class> <property name="Access Policy Provider">file-access-policy-provider</property> </authorizer> <authorizer> <identifier>file-provider</identifier> <class>org.apache.nifi.authorization.FileAuthorizer</class> <property name="Authorizations File">./conf/authorizations.xml</property> <property name="Users File">./conf/users.xml</property> <property name="Initial Admin Identity">cn=admin,dc=example,dc=local</property> <property name="Legacy Authorized Users File"></property> <property name="Node Identity 1"></property> </authorizer>       Logs nifi-user.log     2021-01-28 16:25:53,940 ERROR [NiFi Web Server-22] o.a.n.w.a.c.AdministrationExceptionMapper org.apache.nifi.admin.service.AdministrationException: Unable to validate the supplied credentials. Please contact the system administrator.. Returning Internal Server Error response. org.apache.nifi.admin.service.AdministrationException: Unable to validate the supplied credentials. Please contact the system administrator. at org.apache.nifi.web.api.AccessResource.createAccessToken(AccessResource.java:743) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory.lambda$static$0(ResourceMethodInvocationHandlerFactory.java:76) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:148) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:191) at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:200) at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:103) at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:493) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:415) at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:104) at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:277) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:272) at org.glassfish.jersey.internal.Errors$1.call(Errors.java:268) at org.glassfish.jersey.internal.Errors.process(Errors.java:316) at org.glassfish.jersey.internal.Errors.process(Errors.java:298) at org.glassfish.jersey.internal.Errors.process(Errors.java:268) at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:289) at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:256) at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:703) at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:416) at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:370) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:389) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:342) at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:229) at org.eclipse.jetty.servlet.ServletHolder$NotAsyncServlet.service(ServletHolder.java:1395) at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:755) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1617) at org.apache.nifi.web.filter.RequestLogger.doFilter(RequestLogger.java:66) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:208) at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347) at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.filter.TimerFilter.doFilter(TimerFilter.java:51) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.filter.ExceptionFilter.doFilter(ExceptionFilter.java:46) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1596) at org.eclipse.jetty.servlets.DoSFilter.doFilterChain(DoSFilter.java:472) at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:325) at org.eclipse.jetty.servlets.DoSFilter.doFilter(DoSFilter.java:295) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.security.headers.StrictTransportSecurityFilter.doFilter(StrictTransportSecurityFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.security.headers.XContentTypeOptionsFilter.doFilter(XContentTypeOptionsFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.security.headers.XSSProtectionFilter.doFilter(XSSProtectionFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.security.headers.ContentSecurityPolicyFilter.doFilter(ContentSecurityPolicyFilter.java:47) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.apache.nifi.web.security.headers.XFrameOptionsFilter.doFilter(XFrameOptionsFilter.java:48) at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1604) at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:545) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143) at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:590) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235) at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1607) at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233) at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1297) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188) at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:485) at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1577) at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186) at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1212) at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141) at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146) at org.eclipse.jetty.server.handler.gzip.GzipHandler.handle(GzipHandler.java:767) at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:221) at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:59) at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127) at org.eclipse.jetty.server.Server.handle(Server.java:500) at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383) at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:547) at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375) at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:270) at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ssl.SslConnection$DecryptedEndPoint.onFillable(SslConnection.java:543) at org.eclipse.jetty.io.ssl.SslConnection.onFillable(SslConnection.java:398) at org.eclipse.jetty.io.ssl.SslConnection$2.succeeded(SslConnection.java:161) at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103) at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:117) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:336) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:313) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:171) at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:129) at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:388) at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806) at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.nifi.authentication.exception.IdentityAccessException: Unable to validate the supplied credentials. Please contact the system administrator. at org.apache.nifi.ldap.LdapProvider.authenticate(LdapProvider.java:309) at org.apache.nifi.web.security.spring.LoginIdentityProviderFactoryBean$1.authenticate(LoginIdentityProviderFactoryBean.java:315) at org.apache.nifi.web.api.AccessResource.createAccessToken(AccessResource.java:733) ... 93 common frames omitted Caused by: org.springframework.dao.IncorrectResultSizeDataAccessException: Incorrect result size: expected 1, actual 2 at org.springframework.security.ldap.SpringSecurityLdapTemplate.searchForSingleEntryInternal(SpringSecurityLdapTemplate.java:365) at org.springframework.security.ldap.SpringSecurityLdapTemplate$3.executeWithContext(SpringSecurityLdapTemplate.java:318) at org.springframework.ldap.core.LdapTemplate.executeWithContext(LdapTemplate.java:817) at org.springframework.ldap.core.LdapTemplate.executeReadOnly(LdapTemplate.java:803) at org.springframework.security.ldap.SpringSecurityLdapTemplate.searchForSingleEntry(SpringSecurityLdapTemplate.java:316) at org.springframework.security.ldap.search.FilterBasedLdapUserSearch.searchForUser(FilterBasedLdapUserSearch.java:127) at org.springframework.security.ldap.authentication.BindAuthenticator.authenticate(BindAuthenticator.java:95) at org.springframework.security.ldap.authentication.LdapAuthenticationProvider.doAuthentication(LdapAuthenticationProvider.java:187) at org.springframework.security.ldap.authentication.AbstractLdapAuthenticationProvider.authenticate(AbstractLdapAuthenticationProvider.java:85) at org.apache.nifi.ldap.LdapProvider.authenticate(LdapProvider.java:279) ... 95 common frames omitted                                                                   ... View more

With this tutorial from Pierre Villard it doesn't work(Pierre is a genius), I was trying to make it work and there is no way to connect to LDAP. That's why my post today as I can't find the problem. ... View more