Cross-link rate limit docs

doc/security/rate_limits.md

@@ -24,6 +24,7 @@ similarly mitigated by a rate limit.
 
 - [User and IP rate limits](../user/admin_area/settings/user_and_ip_rate_limits.md).
 - [Rate limits on raw endpoints](../user/admin_area/settings/rate_limits_on_raw_endpoints.md)
+- [Protected paths](../user/admin_area/settings/protected_paths.md).
 
 ## Rack Attack initializer
 

doc/user/admin_area/settings/protected_paths.md

@@ -4,7 +4,11 @@ type: reference
 
 # Protected paths **(CORE ONLY)**
 
-GitLab protects the following paths with Rack Attack by default:
+Rate limiting is a common technique used to improve the security and durability
+of a web application. For more details, see
+[Rate limits](../../../security/rate_limits.md).
+
+GitLab rate limits the following paths with Rack Attack by default:
 
 ```plaintext
 '/users/password',