TLS version & cipher check

Confirms your server supports TLS 1.2/1.3, rejects TLS 1.0/1.1, and uses forward-secret cipher suites.

Quick answer

We negotiate handshakes across TLS 1.0-1.3 and record which versions and ciphers your server accepts.

What it checks

Where to find it in Lemwatch

Site details → Security → SSL.

How to fix

  1. In nginx/Apache, set ssl_protocols TLSv1.2 TLSv1.3;.
  2. Use Mozilla SSL Config Generator's "intermediate" profile.
  3. Reload the server.
  4. Re-run the check.

FAQ

Will disabling TLS 1.0 break old clients?

Maybe IE10 on Windows 7. All modern browsers/apps support 1.2+.

Should I enable TLS 1.3 only?

Too aggressive — some corporate proxies stall on 1.3.

Related