title: How do I configure alternate SSL properties for connection to Spring Boot Admin?
body: <p>Is there a way to configure the Eureka client to use a different keystore\truststore than the spring-boot embedded tomcat? OR is there a way to disable cert validation in SBA server?</p>
  
  <p>I have a situation where I have a cluster of spring-boot based microservices across several VMs. All of the microservices, including backend management like SBA and Eureka server are secured using HTTPS and the typical spring-boot SSL certificate configuration. For these services I am using a self-signed CA to generate certificates for each machine. One exception to this is the "gateway" service which serves the api through to our web client. This service is configured with a certificate signed by a real CA, as it is the only publicly accessible service</p>
  
  <p>Getting to the point, my "gateway" service is unable to connect to SBA server, I see a scroll of SSL-related errors complaining about the hostname of the client not matching any alt names in its certificate. This is because it is presenting its public cert to SBA which does not match the internal host name that the request is originating from.</p>
  
  <p>My services are using Netflix Eureka and service discovery.</p>
  
  <p>EDIT: Adding stacktrace from SBA Server:</p>
  
  <pre><code>2019-02-06 21:34:30 [reactor-http-epoll-3] ERROR r.n.http.client.HttpClientConnect - [id: 0x5844260b, L:/172.17.0.5:40928 - R:myhost.mydomain.com/172.xxx.xxx.xxx:443] The connection observed an error
  javax.net.ssl.SSLHandshakeException: General SSLEngine problem
          at sun.security.ssl.Handshaker.checkThrown(Handshaker.java:1521)
          at sun.security.ssl.SSLEngineImpl.checkTaskThrown(SSLEngineImpl.java:528)
          at sun.security.ssl.SSLEngineImpl.readNetRecord(SSLEngineImpl.java:802)
          at sun.security.ssl.SSLEngineImpl.unwrap(SSLEngineImpl.java:766)
          at javax.net.ssl.SSLEngine.unwrap(SSLEngine.java:624)
          at io.netty.handler.ssl.SslHandler$SslEngineType$3.unwrap(SslHandler.java:294)
          at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1297)
          at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1199)
          at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1243)
          at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:502)
          at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:441)
          at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:278)
          at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
          at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
          at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
          at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
          at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
          at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
          at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
          at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:799)
          at io.netty.channel.epoll.AbstractEpollChannel$AbstractEpollUnsafe$1.run(AbstractEpollChannel.java:382)
          at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163)
          at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404)
          at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:335)
          at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)
          at java.lang.Thread.run(Thread.java:748)
  Caused by: javax.net.ssl.SSLHandshakeException: General SSLEngine problem
          at sun.security.ssl.Alerts.getSSLException(Alerts.java:192)
          at sun.security.ssl.SSLEngineImpl.fatal(SSLEngineImpl.java:1709)
          at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:318)
          at sun.security.ssl.Handshaker.fatalSE(Handshaker.java:310)
          at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1639)
          at sun.security.ssl.ClientHandshaker.processMessage(ClientHandshaker.java:223)
          at sun.security.ssl.Handshaker.processLoop(Handshaker.java:1037)
          at sun.security.ssl.Handshaker$1.run(Handshaker.java:970)
          at sun.security.ssl.Handshaker$1.run(Handshaker.java:967)
          at java.security.AccessController.doPrivileged(Native Method)
          at sun.security.ssl.Handshaker$DelegatedTask.run(Handshaker.java:1459)
          at io.netty.handler.ssl.SslHandler.runDelegatedTasks(SslHandler.java:1460)
          at io.netty.handler.ssl.SslHandler.unwrap(SslHandler.java:1365)
          ... 19 common frames omitted
  Caused by: java.security.cert.CertificateException: No subject alternative DNS name matching myhost.mydomain.com found.
          at sun.security.util.HostnameChecker.matchDNS(HostnameChecker.java:214)
          at sun.security.util.HostnameChecker.match(HostnameChecker.java:96)
          at sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:455)
          at sun.security.ssl.X509TrustManagerImpl.checkIdentity(X509TrustManagerImpl.java:436)
          at sun.security.ssl.X509TrustManagerImpl.checkTrusted(X509TrustManagerImpl.java:252)
          at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(X509TrustManagerImpl.java:136)
          at sun.security.ssl.ClientHandshaker.serverCertificate(ClientHandshaker.java:1626)
          ... 27 common frames omitted
  </code></pre>
  
  <p>EDIT: Upon further inspection, I have the sequence of this issue wrong. The SSL error is not occurring when the gateway tries to register with SBA, it actually registers fine, the SSL error is occurring when SBA tries to reach back to actuator on the gateway. </p>
  
  <p>So I guess the updated question is a bit more complicated: Is there a way to configure actuator with a different keystore/truststore. Furthermore, is there a way to open up Actuator in Zuul only for connections on the backend like SBA and not for users on the public/client end?</p>