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Enter a hostname to test the server for CVE-2016-2107.

This test has been discontinued in March 2021. You can use the open-source command line tool or the SSL Labs online test.

All good, seems fixed or unaffected!

Uh-oh, something went wrong:


You can specify a port like this 443 by default.

To learn more about the vulnerability, read my zero-to-decryption write-up.