/*
 * Copyright 2013-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.netflix.sidecar;

import java.net.URI;

import javax.validation.constraints.Max;
import javax.validation.constraints.Min;

import lombok.Data;

import org.springframework.boot.context.properties.ConfigurationProperties;

/**
 * @author Spencer Gibb
 */
@Data
@ConfigurationProperties("sidecar")
public class SidecarProperties {

	private URI healthUri;

	private URI homePageUri;

	@Max(65535)
	@Min(1)
	private int port;

}

/*
 * Copyright 2013-2015 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.cloud.netflix.sidecar;

import java.net.URI;

import lombok.Data;

import org.springframework.boot.context.properties.ConfigurationProperties;

/**
 * @author Spencer Gibb
 */
@Data
@ConfigurationProperties("sidecar")
public class SidecarProperties {

	private URI healthUri;

	private URI homePageUri;

	private int port;

}

--- 
+++ 
@@ -18,6 +18,9 @@
 
 import java.net.URI;
 
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+
 import lombok.Data;
 
 import org.springframework.boot.context.properties.ConfigurationProperties;
@@ -33,6 +36,8 @@
 
 	private URI homePageUri;
 
+	@Max(65535)
+	@Min(1)
 	private int port;
 
 }
Put min/max constraints on sidecar.port
