Network Administrators

IP whitelisting

If you are organizing an event at a school or other location that requires many people to be able to access Lichess at the same time, you can request higher rate limits by sending a request with the network's IP address to contact@lichess.org.

Domains

Your firewall should be configured to allow traffic to/from these domains:

• lichess.org (and its subdomains, ex socket2.lichess.org)
• lichess1.org (used for static assets)

Captcha errors during login

We use CloudFlare Turnstile for security, like many other websites. Check your device and network for compatibility.