diff --git a/server-nginx-default b/server-nginx-default
index a666752..9fabd0c 100644
--- a/server-nginx-default
+++ b/server-nginx-default
@@ -126,6 +126,43 @@ server {
             proxy_set_header X-Forwarded-Proto $scheme;
         }
 
+        # Bayesian Presentation - FastAPI Backend (WebSocket 지원)
+        location ^~ /bayesian-api/ {
+            proxy_pass http://localhost:3001/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            # WebSocket 지원
+            proxy_read_timeout 86400;
+            proxy_send_timeout 86400;
+            proxy_buffering off;
+        }
+
+        # Bayesian Presentation - Frontend (Vite Dev Server)
+        location ^~ /bayesian/ {
+            proxy_pass http://localhost:5174/bayesian/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            # HTTP/2 프로토콜 에러 방지 (Vite HMR 스트리밍 지원)
+            proxy_buffering off;
+            proxy_request_buffering off;
+            proxy_cache off;
+            chunked_transfer_encoding on;
+            # 버퍼 크기 증가
+            proxy_buffer_size 128k;
+            proxy_buffers 8 256k;
+            proxy_busy_buffers_size 512k;
+        }
+
         location /.well-known/acme-challenge/ {
             alias /var/www/html/.well-known/acme-challenge/;
         }
@@ -276,6 +313,43 @@ server {
             proxy_set_header X-Forwarded-Proto $scheme;
         }
 
+        # Bayesian Presentation - FastAPI Backend (WebSocket 지원)
+        location ^~ /bayesian-api/ {
+            proxy_pass http://localhost:3001/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            # WebSocket 지원
+            proxy_read_timeout 86400;
+            proxy_send_timeout 86400;
+            proxy_buffering off;
+        }
+
+        # Bayesian Presentation - Frontend (Vite Dev Server)
+        location ^~ /bayesian/ {
+            proxy_pass http://localhost:5174/bayesian/;
+            proxy_http_version 1.1;
+            proxy_set_header Upgrade $http_upgrade;
+            proxy_set_header Connection "upgrade";
+            proxy_set_header Host $host;
+            proxy_set_header X-Real-IP $remote_addr;
+            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+            proxy_set_header X-Forwarded-Proto $scheme;
+            # HTTP/2 프로토콜 에러 방지 (Vite HMR 스트리밍 지원)
+            proxy_buffering off;
+            proxy_request_buffering off;
+            proxy_cache off;
+            chunked_transfer_encoding on;
+            # 버퍼 크기 증가
+            proxy_buffer_size 128k;
+            proxy_buffers 8 256k;
+            proxy_busy_buffers_size 512k;
+        }
+
         location /.well-known/acme-challenge/ {
             alias /var/www/html/.well-known/acme-challenge/;
         }