diff -r c3d1236b6c09 -r 3542951a98cb dendrite/server/templates/nginx.conf.j2
--- a/dendrite/server/templates/nginx.conf.j2	Mon Mar 23 22:22:19 2026 -0500
+++ b/dendrite/server/templates/nginx.conf.j2	Mon Mar 23 22:22:36 2026 -0500
@@ -1,3 +1,5 @@
+limit_req_zone $binary_remote_addr zone=dendrite_reg:10m rate=2r/m;
+
 server {
     listen 80;
     server_name {{nginx_server_name}};
@@ -36,6 +38,11 @@
     proxy_set_header X-Forwarded-Proto $scheme;
     proxy_read_timeout                 600;
 
+    location ~* ^/_matrix/client/[^/]+/register {
+        limit_req zone=dendrite_reg burst=3 nodelay;
+        proxy_pass http://127.0.0.1:{{nginx_proxy_port}};
+    }
+
     location /_matrix {
         proxy_pass http://127.0.0.1:{{nginx_proxy_port}};
     }