You might see renders with 504 or 403 status codes in your CDN Analytics menu or Render history menu, meaning your firewalls might block or sometimes rate-limit our requests while rendering the pages, leading to errors in the rendered version or failed renders.
So it is important to whitelist Prerender in your firewalls to avoid these and similar issues.
Prerender's IP Addresses and User Agents
You can find our IP addresses and user agent strings below:
- IP Addresses: https://ipranges.prerender.io/ipranges-all.txt
- User Agents: List of crawlers
The process for whitelisting IP addresses or user agents differs based on the firewall you are using. Typically, firewalls provide documentation that outlines this process. If you need help, please reach out to your development team or the support team for your firewall.
Be sure to share the two links mentioned above so they can implement the necessary settings on your behalf.