Fix passkey login 429 by forwarding client IPs correctly.

Forward X-Forwarded-For through frontend nginx, use TRUST_PROXY=1 for the Docker hop, and limit auth rate limiting to login flows only.

Co-authored-by: Cursor <cursoragent@cursor.com>

.env.example

@@ -13,8 +13,8 @@ RP_ID=localhost
 # Must match the frontend URL exactly (Vite dev: http://localhost:5173; Docker: http://localhost)
 ORIGIN=http://localhost:5173
 
-# Behind Nginx Proxy Manager — see docs/deployment/npm-security.md
+# Behind reverse proxy — see docs/deployment/npm-security.md
-# TRUST_PROXY=172.16.10.10
+# Docker Compose (NPM → frontend nginx → backend): TRUST_PROXY=1
 # TRUST_PROXY=1
 
 # Docker Compose database (required for production deploy)

client/nginx.conf

@@ -43,6 +43,9 @@ server {
         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;
         proxy_cache_bypass $http_upgrade;
     }
 }

docs/deployment/npm-security.md

@@ -30,8 +30,9 @@ proxy_set_header X-Real-IP $remote_addr;
 ORIGIN=https://kapteins-daagbok.eu
 RP_ID=kapteins-daagbok.eu
 SESSION_SECRET=<min. 32 Zeichen, openssl rand -base64 48>
-TRUST_PROXY=172.16.10.10
+# Docker Compose: Frontend-Nginx ist der direkte Proxy zum Backend → 1 Hop
-# oder TRUST_PROXY=1 für genau einen Proxy-Hop
+TRUST_PROXY=1
+# Nur bei direktem Backend-Zugriff ohne Frontend-Nginx: NPM-IP, z. B. TRUST_PROXY=172.16.10.10
 ```
 
 `ORIGIN` muss **exakt** der Browser-URL entsprechen (ohne trailing slash).

scripts/server-patch-env-sprint1.sh

@@ -34,7 +34,7 @@ if ! grep -q "^POSTGRES_PASSWORD=" "$ENV_FILE" || grep -q "^POSTGRES_PASSWORD=$"
 else
   echo "  keep  POSTGRES_PASSWORD (already set)"
 fi
-# NPM on 172.16.10.10 → app on this host
+# Frontend-Nginx → Backend (one hop); NPM is in front of Nginx, not Backend directly
-ensure_var TRUST_PROXY "172.16.10.10"
+ensure_var TRUST_PROXY "1"
 
 echo "Done. Verify with: docker exec daagbox-prod-db psql -U postgres -d daagbox -c 'SELECT 1'"

server/src/app.ts

@@ -45,6 +45,18 @@ export function createApp(): express.Express {
   app.use(cookieParser())
   app.use(express.json({ limit: '50mb' }))
 
+  /** Passkey login/register only — not person-pool, profile, etc. */
+  const authFlowPaths = new Set([
+    '/register-options',
+    '/register-verify',
+    '/login-options',
+    '/login-verify',
+    '/reauth-options',
+    '/reauth-verify',
+    '/logout',
+    '/session'
+  ])
+
   const authLimiter = rateLimit({
     windowMs: 15 * 60 * 1000,
     max: 60,
@@ -66,7 +78,12 @@ export function createApp(): express.Express {
     legacyHeaders: false
   })
 
-  app.use('/api/auth', authLimiter)
+  app.use('/api/auth', (req, res, next) => {
+    if (authFlowPaths.has(req.path)) {
+      return authLimiter(req, res, next)
+    }
+    return next()
+  })
   app.use('/api/collaboration/invite-details', publicCollaborationLimiter)
   app.use('/api/collaboration/share-pull', publicCollaborationLimiter)
   app.use('/api', apiLimiter)