diff --git a/backend-node/src/app.ts b/backend-node/src/app.ts
index 53a00c0b..3b567a0a 100644
--- a/backend-node/src/app.ts
+++ b/backend-node/src/app.ts
@@ -30,7 +30,7 @@ app.use(express.urlencoded({ extended: true, limit: "10mb" }));
 // CORS 설정
 app.use(
   cors({
-    origin: config.cors.origin,
+    origin: config.cors.origin.split(",").map((url) => url.trim()),
     credentials: true,
     methods: ["GET", "POST", "PUT", "DELETE", "PATCH", "OPTIONS"],
     allowedHeaders: ["Content-Type", "Authorization", "X-Requested-With"],
@@ -86,11 +86,13 @@ app.use(errorHandler);
 
 // 서버 시작
 const PORT = config.port;
+const HOST = config.host;
 
-app.listen(PORT, () => {
-  logger.info(`🚀 Server is running on port ${PORT}`);
+app.listen(PORT, HOST, () => {
+  logger.info(`🚀 Server is running on ${HOST}:${PORT}`);
   logger.info(`📊 Environment: ${config.nodeEnv}`);
-  logger.info(`🔗 Health check: http://localhost:${PORT}/health`);
+  logger.info(`🔗 Health check: http://${HOST}:${PORT}/health`);
+  logger.info(`🌐 External access: http://39.117.244.52:${PORT}/health`);
 });
 
 export default app;
diff --git a/backend-node/src/config/environment.ts b/backend-node/src/config/environment.ts
index be936f76..56478ae3 100644
--- a/backend-node/src/config/environment.ts
+++ b/backend-node/src/config/environment.ts
@@ -82,8 +82,8 @@ const config: Config = {
 
   // CORS 설정
   cors: {
-    origin: process.env.CORS_ORIGIN || "http://localhost:9771",
-    credentials: process.env.CORS_CREDENTIALS === "true",
+    origin: process.env.CORS_ORIGIN || "http://localhost:9771,http://192.168.0.70:5555,http://39.117.244.52:5555",
+    credentials: process.env.CORS_CREDENTIALS === "true" || true,
   },
 
   // 로깅 설정
diff --git a/docker/prod/docker-compose.backend.prod.yml b/docker/prod/docker-compose.backend.prod.yml
index cd29965c..3cded048 100644
--- a/docker/prod/docker-compose.backend.prod.yml
+++ b/docker/prod/docker-compose.backend.prod.yml
@@ -5,20 +5,17 @@ services:
       context: ../../backend-node
       dockerfile: ../docker/prod/backend.Dockerfile # 운영용 Dockerfile
     container_name: pms-backend-prod
-    ports:
-      - "8080:8080"
+    network_mode: "host" # 호스트 네트워크 모드
     environment:
       - NODE_ENV=production
       - PORT=8080
+      - HOST=0.0.0.0 # 모든 인터페이스에서 바인딩
       - DATABASE_URL=postgresql://postgres:ph0909!!@39.117.244.52:11132/plm
       - JWT_SECRET=ilshin-plm-super-secret-jwt-key-2024
       - JWT_EXPIRES_IN=24h
-      - CORS_ORIGIN=http://192.168.0.70:5555
+      - CORS_ORIGIN=http://192.168.0.70:5555,http://39.117.244.52:5555
       - CORS_CREDENTIALS=true
       - LOG_LEVEL=info
-    # 운영용에서는 볼륨 마운트 없음 (보안상 이유)
-    networks:
-      - pms-network
     restart: unless-stopped
     healthcheck:
       test: ["CMD", "curl", "-f", "http://localhost:8080/health"]
diff --git a/frontend/lib/api/client.ts b/frontend/lib/api/client.ts
index e3eef389..659a512a 100644
--- a/frontend/lib/api/client.ts
+++ b/frontend/lib/api/client.ts
@@ -1,7 +1,6 @@
 import axios, { AxiosResponse, AxiosError } from "axios";
 
-// API 기본 URL 설정
-export const API_BASE_URL = process.env.NEXT_PUBLIC_API_URL || "http://localhost:8080/api";
+export const API_BASE_URL = "http://39.117.244.52:8080/api";
 
 // JWT 토큰 관리 유틸리티
 const TokenManager = {
diff --git a/frontend/next.config.mjs b/frontend/next.config.mjs
index 286faf4a..50f2755d 100644
--- a/frontend/next.config.mjs
+++ b/frontend/next.config.mjs
@@ -41,9 +41,9 @@ const nextConfig = {
     ];
   },
 
-  // 환경 변수 (런타임에 읽기)
+  // 환경 변수 (런타임에 읽기) - 내부 IP로 통일
   env: {
-    NEXT_PUBLIC_API_URL: process.env.NEXT_PUBLIC_API_URL || "http://192.168.0.70:8080/api",
+    NEXT_PUBLIC_API_URL: process.env.NEXT_PUBLIC_API_URL || "http://39.117.244.52:8080/api",
   },
 };