diff --git a/infra/terraform/main.tf b/infra/terraform/main.tf
index 1817677f..2ef40255 100644
--- a/infra/terraform/main.tf
+++ b/infra/terraform/main.tf
@@ -125,17 +125,51 @@ resource "aws_security_group" "sg_1" {
     Name  = "team5-sg-1"
   }
 
+  # SSH
   ingress {
-    from_port   = 0
-    to_port     = 0
-    protocol    = "all" # 모든 프로토콜
-    cidr_blocks = ["0.0.0.0/0"] # 모든 IP 허용
+    from_port   = 22
+    to_port     = 22
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"] # 필요 시 특정 IP로 제한 가능
+  }
+
+  # HTTP
+  ingress {
+    from_port   = 80
+    to_port     = 80
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  # HTTPS
+  ingress {
+    from_port   = 443
+    to_port     = 443
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  # WebRTC UDP
+  ingress {
+    from_port   = 10000
+    to_port     = 20000
+    protocol    = "udp"
+    cidr_blocks = ["0.0.0.0/0"]
   }
 
+  # NPM (port 81)
+  ingress {
+    from_port   = 81
+    to_port     = 81
+    protocol    = "tcp"
+    cidr_blocks = ["0.0.0.0/0"]
+  }
+
+  # 아웃바운드 모든 프로토콜
   egress {
     from_port   = 0
     to_port     = 0
-    protocol    = "all" # 모든 프로토콜
+    protocol    = "all"
     cidr_blocks = ["0.0.0.0/0"] # 모든 IP 허용
   }
 }
diff --git a/src/main/java/com/back/domain/file/entity/EntityType.java b/src/main/java/com/back/domain/file/entity/EntityType.java
index 3c5a4f49..9f4bf77a 100644
--- a/src/main/java/com/back/domain/file/entity/EntityType.java
+++ b/src/main/java/com/back/domain/file/entity/EntityType.java
@@ -1,5 +1,5 @@
 package com.back.domain.file.entity;
 
 public enum EntityType {
-    POST, COMMENT
+    POST, AVATAR, PROFILE
 }
\ No newline at end of file
diff --git a/src/main/java/com/back/domain/file/service/FileService.java b/src/main/java/com/back/domain/file/service/FileService.java
index 74b03023..dd55d6a5 100644
--- a/src/main/java/com/back/domain/file/service/FileService.java
+++ b/src/main/java/com/back/domain/file/service/FileService.java
@@ -7,12 +7,8 @@
 import com.back.domain.file.dto.FileReadResponseDto;
 import com.back.domain.file.dto.FileUpdateResponseDto;
 import com.back.domain.file.dto.FileUploadResponseDto;
-import com.back.domain.file.entity.AttachmentMapping;
-import com.back.domain.file.entity.EntityType;
 import com.back.domain.file.entity.FileAttachment;
-import com.back.domain.file.repository.AttachmentMappingRepository;
 import com.back.domain.file.repository.FileAttachmentRepository;
-import com.back.domain.file.util.EntityValidator;
 import com.back.domain.user.entity.User;
 import com.back.domain.user.repository.UserRepository;
 import com.back.global.exception.CustomException;
@@ -21,8 +17,6 @@
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
diff --git a/src/main/java/com/back/domain/file/util/EntityValidator.java b/src/main/java/com/back/domain/file/util/EntityValidator.java
deleted file mode 100644
index 7167bc1c..00000000
--- a/src/main/java/com/back/domain/file/util/EntityValidator.java
+++ /dev/null
@@ -1,31 +0,0 @@
-package com.back.domain.file.util;
-
-import com.back.domain.board.comment.repository.CommentRepository;
-import com.back.domain.board.post.repository.PostRepository;
-import com.back.domain.file.entity.EntityType;
-import com.back.global.exception.CustomException;
-import com.back.global.exception.ErrorCode;
-import lombok.RequiredArgsConstructor;
-import org.springframework.stereotype.Component;
-
-/**
- * EntityType, EntityId를 통해 매핑되는 데이터 존재 확인
- */
-@Component
-@RequiredArgsConstructor
-public class EntityValidator {
-    private final PostRepository postRepository;
-    private final CommentRepository commentRepository;
-
-    public void validate(EntityType entityType, Long entityId) {
-        switch (entityType) {
-            case POST:
-                if(!postRepository.existsById(entityId)) throw new CustomException(ErrorCode.POST_NOT_FOUND);
-                break;
-
-            case COMMENT:
-                if(!commentRepository.existsById(entityId)) throw new CustomException(ErrorCode.COMMENT_NOT_FOUND);
-                break;
-        }
-    }
-}
diff --git a/src/main/java/com/back/global/security/oauth/OAuth2LoginSuccessHandler.java b/src/main/java/com/back/global/security/oauth/OAuth2LoginSuccessHandler.java
index 7c0ba157..a5fff504 100644
--- a/src/main/java/com/back/global/security/oauth/OAuth2LoginSuccessHandler.java
+++ b/src/main/java/com/back/global/security/oauth/OAuth2LoginSuccessHandler.java
@@ -15,6 +15,7 @@
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.RequiredArgsConstructor;
+import org.springframework.beans.factory.annotation.Value;
 import org.springframework.security.core.Authentication;
 import org.springframework.security.web.authentication.AuthenticationSuccessHandler;
 import org.springframework.stereotype.Component;
@@ -40,6 +41,8 @@ public class OAuth2LoginSuccessHandler implements AuthenticationSuccessHandler {
     private final UserTokenRepository userTokenRepository;
     private final ObjectMapper objectMapper;
 
+    @Value("${frontend.base-url}")
+    private String FRONTEND_BASE_URL;
     @Override
     public void onAuthenticationSuccess(HttpServletRequest request,
                                         HttpServletResponse response,
@@ -73,7 +76,7 @@ public void onAuthenticationSuccess(HttpServletRequest request,
             );
 
             // 프론트엔드 리다이렉트
-            response.sendRedirect("http://localhost:3000/login/oauth2");
+            response.sendRedirect(FRONTEND_BASE_URL + "/login/oauth2");
         } catch (CustomException e) {
             handleException(response, e);
         } catch (Exception e) {