diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration.java
index 78f7bd2ecd..5d7cb49cb5 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryConfiguration.java
@@ -25,11 +25,14 @@ import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.web.embedded.jetty.JettyReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
 import org.springframework.boot.web.embedded.netty.NettyReactiveWebServerFactory;
 import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowDeploymentInfoCustomizer;
 import org.springframework.boot.web.embedded.undertow.UndertowReactiveWebServerFactory;
 import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
 import org.springframework.context.annotation.Bean;
@@ -45,6 +48,7 @@ import org.springframework.http.client.reactive.ReactorResourceFactory;
  *
  * @author Brian Clozel
  * @author Raheela Aslam
+ * @author Sergey Serdyuk
  */
 abstract class ReactiveWebServerFactoryConfiguration {
 
@@ -105,8 +109,11 @@ abstract class ReactiveWebServerFactoryConfiguration {
 
 		@Bean
 		public JettyReactiveWebServerFactory jettyReactiveWebServerFactory(
-				JettyResourceFactory resourceFactory) {
+				JettyResourceFactory resourceFactory,
+				ObjectProvider<JettyServerCustomizer> serverCustomizers) {
 			JettyReactiveWebServerFactory serverFactory = new JettyReactiveWebServerFactory();
+			serverFactory.getServerCustomizers().addAll(
+					serverCustomizers.orderedStream().collect(Collectors.toList()));
 			serverFactory.setResourceFactory(resourceFactory);
 			return serverFactory;
 		}
@@ -119,8 +126,15 @@ abstract class ReactiveWebServerFactoryConfiguration {
 	static class EmbeddedUndertow {
 
 		@Bean
-		public UndertowReactiveWebServerFactory undertowReactiveWebServerFactory() {
-			return new UndertowReactiveWebServerFactory();
+		public UndertowReactiveWebServerFactory undertowReactiveWebServerFactory(
+				ObjectProvider<UndertowDeploymentInfoCustomizer> deploymentInfoCustomizers,
+				ObjectProvider<UndertowBuilderCustomizer> builderCustomizers) {
+			UndertowReactiveWebServerFactory factory = new UndertowReactiveWebServerFactory();
+			factory.getDeploymentInfoCustomizers().addAll(deploymentInfoCustomizers
+					.orderedStream().collect(Collectors.toList()));
+			factory.getBuilderCustomizers().addAll(
+					builderCustomizers.orderedStream().collect(Collectors.toList()));
+			return factory;
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryConfiguration.java b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryConfiguration.java
index fceccda369..d5f294775e 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryConfiguration.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryConfiguration.java
@@ -32,11 +32,14 @@ import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
 import org.springframework.boot.autoconfigure.condition.SearchStrategy;
+import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
 import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
 import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
+import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowDeploymentInfoCustomizer;
 import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
 import org.springframework.boot.web.servlet.server.ServletWebServerFactory;
 import org.springframework.context.annotation.Bean;
@@ -54,6 +57,7 @@ import org.springframework.context.annotation.Configuration;
  * @author Brian Clozel
  * @author Stephane Nicoll
  * @author Raheela Asalm
+ * @author Sergey Serdyuk
  */
 @Configuration(proxyBeanMethods = false)
 class ServletWebServerFactoryConfiguration {
@@ -93,8 +97,12 @@ class ServletWebServerFactoryConfiguration {
 	public static class EmbeddedJetty {
 
 		@Bean
-		public JettyServletWebServerFactory JettyServletWebServerFactory() {
-			return new JettyServletWebServerFactory();
+		public JettyServletWebServerFactory JettyServletWebServerFactory(
+				ObjectProvider<JettyServerCustomizer> serverCustomizers) {
+			JettyServletWebServerFactory factory = new JettyServletWebServerFactory();
+			factory.getServerCustomizers().addAll(
+					serverCustomizers.orderedStream().collect(Collectors.toList()));
+			return factory;
 		}
 
 	}
@@ -109,8 +117,15 @@ class ServletWebServerFactoryConfiguration {
 	public static class EmbeddedUndertow {
 
 		@Bean
-		public UndertowServletWebServerFactory undertowServletWebServerFactory() {
-			return new UndertowServletWebServerFactory();
+		public UndertowServletWebServerFactory undertowServletWebServerFactory(
+				ObjectProvider<UndertowDeploymentInfoCustomizer> deploymentInfoCustomizers,
+				ObjectProvider<UndertowBuilderCustomizer> builderCustomizers) {
+			UndertowServletWebServerFactory factory = new UndertowServletWebServerFactory();
+			factory.getDeploymentInfoCustomizers().addAll(deploymentInfoCustomizers
+					.orderedStream().collect(Collectors.toList()));
+			factory.getBuilderCustomizers().addAll(
+					builderCustomizers.orderedStream().collect(Collectors.toList()));
+			return factory;
 		}
 
 	}
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryAutoConfigurationTests.java
index f3efd04152..849abfc91c 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/reactive/ReactiveWebServerFactoryAutoConfigurationTests.java
@@ -20,16 +20,26 @@ import org.junit.Test;
 import org.mockito.Mockito;
 
 import org.springframework.boot.autoconfigure.AutoConfigurations;
+import org.springframework.boot.autoconfigure.web.servlet.ServletWebServerFactoryAutoConfiguration;
 import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
+import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
+import org.springframework.boot.web.embedded.jetty.JettyReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
+import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
 import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowDeploymentInfoCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowReactiveWebServerFactory;
+import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
 import org.springframework.boot.web.reactive.context.AnnotationConfigReactiveWebApplicationContext;
 import org.springframework.boot.web.reactive.context.AnnotationConfigReactiveWebServerApplicationContext;
 import org.springframework.boot.web.reactive.server.ConfigurableReactiveWebServerFactory;
 import org.springframework.boot.web.reactive.server.ReactiveWebServerFactory;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
+import org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext;
 import org.springframework.context.ApplicationContextException;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@@ -149,6 +159,48 @@ public class ReactiveWebServerFactoryAutoConfigurationTests {
 		});
 	}
 
+	@Test
+	public void jettyServerCustomizerBeanIsAddedToFactory() {
+		ReactiveWebApplicationContextRunner runner = new ReactiveWebApplicationContextRunner(
+				AnnotationConfigReactiveWebApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ReactiveWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(JettyServerCustomizer.class);
+		runner.run((context) -> {
+			JettyReactiveWebServerFactory factory = context
+					.getBean(JettyReactiveWebServerFactory.class);
+			assertThat(factory.getServerCustomizers()).hasSize(1);
+		});
+	}
+
+	@Test
+	public void undertowDeploymentInfoCustomizerBeanIsAddedToFactory() {
+		ReactiveWebApplicationContextRunner runner = new ReactiveWebApplicationContextRunner(
+				AnnotationConfigReactiveWebApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ReactiveWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(UndertowDeploymentInfoCustomizer.class);
+		runner.run((context) -> {
+			UndertowReactiveWebServerFactory factory = context
+					.getBean(UndertowReactiveWebServerFactory.class);
+			assertThat(factory.getDeploymentInfoCustomizers()).hasSize(1);
+		});
+	}
+
+	@Test
+	public void undertowBuilderCustomizerBeanIsAddedToFactory() {
+		ReactiveWebApplicationContextRunner runner = new ReactiveWebApplicationContextRunner(
+				AnnotationConfigReactiveWebApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ReactiveWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(UndertowBuilderCustomizer.class);
+		runner.run((context) -> {
+			UndertowReactiveWebServerFactory factory = context
+					.getBean(UndertowReactiveWebServerFactory.class);
+			assertThat(factory.getBuilderCustomizers()).hasSize(1);
+		});
+	}
+
 	@Test
 	public void forwardedHeaderTransformerShouldBeConfigured() {
 		this.contextRunner.withUserConfiguration(HttpHandlerConfiguration.class)
diff --git a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryAutoConfigurationTests.java b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryAutoConfigurationTests.java
index 6c62abb5f4..87bc2131bf 100644
--- a/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryAutoConfigurationTests.java
+++ b/spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/ServletWebServerFactoryAutoConfigurationTests.java
@@ -31,10 +31,16 @@ import org.springframework.boot.autoconfigure.condition.ConditionalOnExpression;
 import org.springframework.boot.test.context.assertj.AssertableWebApplicationContext;
 import org.springframework.boot.test.context.runner.ContextConsumer;
 import org.springframework.boot.test.context.runner.WebApplicationContextRunner;
+import org.springframework.boot.web.embedded.jetty.JettyServerCustomizer;
+import org.springframework.boot.web.embedded.jetty.JettyServletWebServerFactory;
 import org.springframework.boot.web.embedded.tomcat.TomcatConnectorCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatContextCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatProtocolHandlerCustomizer;
 import org.springframework.boot.web.embedded.tomcat.TomcatServletWebServerFactory;
+import org.springframework.boot.web.embedded.undertow.UndertowBuilderCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowDeploymentInfoCustomizer;
+import org.springframework.boot.web.embedded.undertow.UndertowServletWebServer;
+import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
 import org.springframework.boot.web.server.WebServerFactoryCustomizer;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
 import org.springframework.boot.web.servlet.ServletRegistrationBean;
@@ -147,6 +153,48 @@ public class ServletWebServerFactoryAutoConfigurationTests {
 				});
 	}
 
+	@Test
+	public void jettyServerCustomizerBeanIsAddedToFactory() {
+		WebApplicationContextRunner runner = new WebApplicationContextRunner(
+				AnnotationConfigServletWebServerApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ServletWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(JettyServerCustomizer.class);
+		runner.run((context) -> {
+			JettyServletWebServerFactory factory = context
+					.getBean(JettyServletWebServerFactory.class);
+			assertThat(factory.getServerCustomizers()).hasSize(1);
+		});
+	}
+
+	@Test
+	public void undertowDeploymentInfoCustomizerBeanIsAddedToFactory() {
+		WebApplicationContextRunner runner = new WebApplicationContextRunner(
+				AnnotationConfigServletWebServerApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ServletWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(UndertowDeploymentInfoCustomizer.class);
+		runner.run((context) -> {
+			UndertowServletWebServerFactory factory = context
+					.getBean(UndertowServletWebServerFactory.class);
+			assertThat(factory.getDeploymentInfoCustomizers()).hasSize(1);
+		});
+	}
+
+	@Test
+	public void undertowBuilderCustomizerBeanIsAddedToFactory() {
+		WebApplicationContextRunner runner = new WebApplicationContextRunner(
+				AnnotationConfigServletWebServerApplicationContext::new)
+						.withConfiguration(AutoConfigurations
+								.of(ServletWebServerFactoryAutoConfiguration.class))
+						.withUserConfiguration(UndertowBuilderCustomizer.class);
+		runner.run((context) -> {
+			UndertowServletWebServerFactory factory = context
+					.getBean(UndertowServletWebServerFactory.class);
+			assertThat(factory.getBuilderCustomizers()).hasSize(1);
+		});
+	}
+
 	@Test
 	public void tomcatConnectorCustomizerBeanIsAddedToFactory() {
 		WebApplicationContextRunner runner = new WebApplicationContextRunner(