diff --git a/fems-api/src/app.js b/fems-api/src/app.js
index 89231ad..7b0ef6b 100644
--- a/fems-api/src/app.js
+++ b/fems-api/src/app.js
@@ -10,34 +10,48 @@ const registerRoutes = require("./routes");
 
 const app = express();
 
-// Middleware
+// Middleware 설정
 app.use(cors(config.cors));
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
 app.use(requestLogger);
 
-// Register all routes
+// 라우트 등록
 registerRoutes(app);
 
-// Error handling
+// 에러 핸들링
 app.use(errorHandler);
 
-// Database initialization and server start
+const waitForDatabase = async (retries = 5, interval = 2000) => {
+  for (let i = 0; i < retries; i++) {
+    try {
+      await sequelize.authenticate();
+      logger.info("Database connection established successfully.");
+      return true;
+    } catch (error) {
+      logger.warn(`Database connection attempt ${i + 1} failed:`, error);
+      if (i < retries - 1) {
+        logger.info(`Retrying in ${interval / 1000} seconds...`);
+        await new Promise((resolve) => setTimeout(resolve, interval));
+      }
+    }
+  }
+  throw new Error("Could not connect to database after multiple attempts");
+};
+
 const initializeServer = async () => {
   try {
-    await sequelize.authenticate();
-    logger.info("Database connection established successfully.");
+    // 데이터베이스 연결 대기
+    await waitForDatabase();
 
-    // Sync database (in development only)
+    // 개발 환경에서만 데이터베이스 동기화
     if (process.env.NODE_ENV !== "production") {
-      // force: true 옵션을 사용하여 테이블을 재생성
       await sequelize.sync({ force: true });
       logger.info("Database synchronized.");
-
-      // 초기 데이터 생성
       await require("./utils/createInitialAdmin")();
     }
 
+    // 서버 시작
     const port = config.port;
     app.listen(port, () => {
       logger.info(`Server is running on port ${port}`);
diff --git a/fems-api/src/config/config.js b/fems-api/src/config/config.js
index 1e2a49e..358a6d9 100644
--- a/fems-api/src/config/config.js
+++ b/fems-api/src/config/config.js
@@ -14,6 +14,16 @@ module.exports = {
       database: process.env.POSTGRES_DB,
       dialect: "postgres",
       logging: true,
+      pool: {
+        max: 5,
+        min: 0,
+        acquire: 30000,
+        idle: 10000,
+      },
+      retry: {
+        max: 5,
+        timeout: 3000,
+      },
     },
     jwt: {
       secret: process.env.JWT_SECRET,
@@ -32,12 +42,22 @@ module.exports = {
     port: process.env.PORT || 3001,
     database: {
       host: process.env.POSTGRES_HOST,
-      port: parseInt(process.env.POSTGRES_PORT),
+      port: parseInt(process.env.POSTGRES_PORT) || 5432,
       username: process.env.POSTGRES_USER,
       password: process.env.POSTGRES_PASSWORD,
       database: process.env.POSTGRES_DB,
       dialect: "postgres",
-      logging: false,
+      logging: true,
+      pool: {
+        max: 5,
+        min: 0,
+        acquire: 30000,
+        idle: 10000,
+      },
+      retry: {
+        max: 5,
+        timeout: 3000,
+      },
     },
     jwt: {
       secret: process.env.JWT_SECRET,
diff --git a/fems-postgres/pg_hba.conf b/fems-postgres/pg_hba.conf
index 2e92ce7..c43ce83 100644
--- a/fems-postgres/pg_hba.conf
+++ b/fems-postgres/pg_hba.conf
@@ -1,10 +1,10 @@
 # fems-postgres/pg_hba.conf
 # TYPE  DATABASE        USER            ADDRESS                 METHOD
 # "local" is for Unix domain socket connections only
+# TYPE  DATABASE        USER            ADDRESS                 METHOD
 local   all             all                                     scram-sha-256
-# IPv4 local connections:
 host    all             all             127.0.0.1/32           scram-sha-256
-# IPv6 local connections:
 host    all             all             ::1/128                scram-sha-256
-# Allow connections from Docker network
-host    all             all             0.0.0.0/0              scram-sha-256
\ No newline at end of file
+host    all             all             0.0.0.0/0              scram-sha-256
+host    all             all             172.16.0.0/12          scram-sha-256
+host    all             all             192.168.0.0/16         scram-sha-256
\ No newline at end of file