diff --git a/README.md b/README.md
index 2f19b08..6c863bf 100644
--- a/README.md
+++ b/README.md
@@ -127,7 +127,7 @@ GET http://localhost:8070/event/member/hyori
 ---
 
 ***- Zuul (Proxy & API Gateway)***<br />
-자세한 설명은 [여기](https://assu10.github.io/dev/2020/08/26/netflix-zuul/) 를 참고
+자세한 설명은 [여기](https://assu10.github.io/dev/2020/08/26/netflix-zuul/)와 [여기](https://assu10.github.io/dev/2020/09/05/netflix-zuul2/) 를 참고
 
 ```shell script
 HOW TO RUN
@@ -156,6 +156,9 @@ http://localhost:5555/api/evt/event/member/hyori
 -- 주울을 통해 회원 서비스의 REST API 호출 (RestTemplate)
 http://localhost:5555/api/mb/member/gift/flower
 
+-- 사전/사후 필터 동작 확인 (상관관계 ID 생성 및 하위 서비스에 전파/응답 헤더에 상관관계 ID 삽입)
+http://localhost:5555/api/mb/member/name/hyori
+
 ```
 
 ---
diff --git a/event-service/src/main/java/com/assu/cloud/eventservice/controller/EventController.java b/event-service/src/main/java/com/assu/cloud/eventservice/controller/EventController.java
index 40461b7..4c0d9c4 100644
--- a/event-service/src/main/java/com/assu/cloud/eventservice/controller/EventController.java
+++ b/event-service/src/main/java/com/assu/cloud/eventservice/controller/EventController.java
@@ -11,8 +11,8 @@ import org.springframework.web.bind.annotation.RestController;
 @RequestMapping("/event")
 public class EventController {
 
-    private CustomConfig customConfig;
-    private MemberFeignClient memberFeignClient;
+    private final CustomConfig customConfig;
+    private final MemberFeignClient memberFeignClient;
 
     public EventController(CustomConfig customConfig, MemberFeignClient memberFeignClient) {
         this.customConfig = customConfig;
diff --git a/member-service/src/main/java/com/assu/cloud/memberservice/controller/MemberController.java b/member-service/src/main/java/com/assu/cloud/memberservice/controller/MemberController.java
index 6ea5aa6..069ec5f 100644
--- a/member-service/src/main/java/com/assu/cloud/memberservice/controller/MemberController.java
+++ b/member-service/src/main/java/com/assu/cloud/memberservice/controller/MemberController.java
@@ -13,8 +13,8 @@ import javax.servlet.ServletRequest;
 @RequestMapping("/member")
 public class MemberController {
 
-    private CustomConfig customConfig;
-    private EventRestTemplateClient eventRestTemplateClient;
+    private final CustomConfig customConfig;
+    private final EventRestTemplateClient eventRestTemplateClient;
 
     public MemberController(CustomConfig customConfig, EventRestTemplateClient eventRestTemplateClient) {
         this.customConfig = customConfig;
diff --git a/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PostFilter.java b/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PostFilter.java
new file mode 100644
index 0000000..19eebd4
--- /dev/null
+++ b/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PostFilter.java
@@ -0,0 +1,69 @@
+package com.assu.cloud.zuulserver.filters;
+
+import com.assu.cloud.zuulserver.utils.FilterUtils;
+import com.netflix.zuul.ZuulFilter;
+import com.netflix.zuul.context.RequestContext;
+import com.netflix.zuul.exception.ZuulException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Component;
+
+/**
+ * 사후 필터
+ *      서비스 호출자에게 다시 전달될 HTTP 응답 헤더에 상관관계 ID 를 삽입하여 사용자 트랜잭션과 연관된 로깅을 연결 지음
+ */
+@Component
+public class PostFilter extends ZuulFilter {
+    /** 해당 타입의 다른 필터와 비교해 실행되어야 하는 순서 */
+    private static final int FILTER_ORDER = 1;
+
+    /** 필터 활성화 여부 */
+    private static final boolean SHOULD_FILTER = true;
+    private static final Logger logger = LoggerFactory.getLogger(PostFilter.class);
+
+    private final FilterUtils filterUtils;
+
+    public PostFilter(FilterUtils filterUtils) {
+        this.filterUtils = filterUtils;
+    }
+
+    /**
+     * 구축하려는 필터의 타입 지정 (사전, 라우팅, 사후)
+     */
+    @Override
+    public String filterType() {
+        return FilterUtils.POST_FILTER_TYPE;
+    }
+
+    /**
+     * 해당 타입의 다른 필터와 비교해 실행되어야 하는 순서
+     */
+    @Override
+    public int filterOrder() {
+        return FILTER_ORDER;
+    }
+
+    /**
+     * 필터 활성화 여부
+     */
+    @Override
+    public boolean shouldFilter() {
+        return SHOULD_FILTER;
+    }
+
+    /**
+     * 필터의 비즈니스 로직 구현
+     *      원래 HTTP 요청에서 전달된 상관관계 ID 를 가져와 응답에 삽입
+     */
+    @Override
+    public Object run() {
+        RequestContext ctx = RequestContext.getCurrentContext();
+
+        logger.debug("============ Adding the correlation id to the outbound headers. {}", filterUtils.getCorrelationId());
+        // 원래 HTTP 요청에서 전달된 상관관계 ID 를 가져와 응답에 삽입
+        ctx.getResponse().addHeader(FilterUtils.CORRELATION_ID, filterUtils.getCorrelationId());
+        logger.debug("============ Completing outgoing request for {}.", ctx.getRequest().getRequestURI());
+
+        return null;
+    }
+}
\ No newline at end of file
diff --git a/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PreFilter.java b/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PreFilter.java
index a196469..6022735 100644
--- a/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PreFilter.java
+++ b/zuulserver/src/main/java/com/assu/cloud/zuulserver/filters/PreFilter.java
@@ -18,12 +18,6 @@ import java.util.UUID;
 @Component
 public class PreFilter extends ZuulFilter {
 
-    private FilterUtils filterUtils;
-
-    public PreFilter(FilterUtils filterUtils) {
-        this.filterUtils = filterUtils;
-    }
-
     /** 해당 타입의 다른 필터와 비교해 실행되어야 하는 순서 */
     private static final int FILTER_ORDER = 1;
 
@@ -31,6 +25,12 @@ public class PreFilter extends ZuulFilter {
     private static final boolean SHOULD_FILTER = true;
     private static final Logger logger = LoggerFactory.getLogger(PreFilter.class);
 
+    private final FilterUtils filterUtils;
+
+    public PreFilter(FilterUtils filterUtils) {
+        this.filterUtils = filterUtils;
+    }
+
     /**
      * 구축하려는 필터의 타입 지정 (사전, 라우팅, 사후)
      */
@@ -71,7 +71,7 @@ public class PreFilter extends ZuulFilter {
 
     /**
      * 필터의 비즈니스 로직 구현
-     *      서비스가 필터를 통과할때마다 실행되는 메서드
+     *      서비스가 필터를 통과할 때마다 실행되는 메서드
      *      상관관계 ID의 존재 여부 확인 후 없다면 생성하여 헤더에 설정
      */
     @Override