diff --git a/conf.d/default.caddy b/conf.d/default.caddy
new file mode 100644
index 0000000..2eda532
--- /dev/null
+++ b/conf.d/default.caddy
@@ -0,0 +1,53 @@
+{
+    # 인증서 관련
+    email abc@firstgarden.co.kr
+
+    # ACME 관련 기본값
+    acme_ca https://acme-v02.api.letsencrypt.org/directory
+
+    # 전역 로그
+    log {
+        level INFO
+        output file /var/log/caddy/access.log {
+            roll_size 10MiB
+            roll_keep 10
+            roll_keep_for 720h
+        }
+    }
+
+    # 기본 타임아웃 (프록시 공통)
+    servers {
+        timeouts {
+            read_body 30s
+            read_header 30s
+            write 30s
+            idle 2m
+        }
+    }
+}
+
+# ===== 공통 스니펫 =====
+
+# 보안 헤더
+(common_headers) {
+    header {
+        X-Frame-Options "DENY"
+        X-Content-Type-Options "nosniff"
+        Referrer-Policy "strict-origin-when-cross-origin"
+        X-XSS-Protection "1; mode=block"
+    }
+}
+
+# 프록시 기본 옵션
+(common_proxy) {
+    reverse_proxy {
+        header_up X-Real-IP {remote_host}
+        header_up X-Forwarded-For {remote_host}
+        header_up X-Forwarded-Proto {scheme}
+
+        transport http {
+            dial_timeout 10s
+            response_header_timeout 30s
+        }
+    }
+}