How do you design HTML5 web apps to resist DoS attacks?

3 Use Caching

Caching is a technique to store frequently used or static data in memory or on disk, reducing the need to fetch it from the database or the network. Caching can improve your web app's performance, scalability, and availability, as well as reduce the load on your server. You can use caching to store data that does not change often, such as images, scripts, stylesheets, or configuration files. You can use HTML5 features like Application Cache or Service Workers to cache data on the client-side, or use a server-side caching system like Redis or Memcached.

4 Monitor Traffic

Monitoring traffic is a technique to track and analyze the requests that your web app receives, such as their source, frequency, duration, and response. Monitoring traffic can help you detect and prevent DoS attacks by identifying unusual or suspicious patterns, such as spikes, floods, or slow requests. You can use monitoring tools like Google Analytics, New Relic, or Datadog to monitor traffic on your web app, or use a network monitoring tool like Wireshark or Nmap to monitor traffic on your server.

5 Implement Security Headers

Security headers are HTTP headers that instruct browsers how to handle your web app's content and communication, such as enforcing HTTPS, preventing cross-site scripting, or restricting iframe loading. Security headers can help you protect your web app from DoS attacks by preventing malicious requests from reaching your server or executing on your client. You can implement security headers on your server-side code or use a third-party service like Helmet or Report URI.

6 Test Your Web App

Testing your web app is a technique to simulate and measure how your web app behaves under different scenarios and conditions, such as high traffic, low bandwidth, or malicious input. Testing your web app can help you identify and fix any vulnerabilities, errors, or performance issues that could make your web app susceptible to DoS attacks. You can use testing tools like JMeter, LoadRunner, or Selenium to test your web app's functionality, performance, and security.

7 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?