[SOLVED] Tomcat strong SSL security

What are ciphers one should specify in Tomcat configuration, apart from

    sslProtocols="TLSv1.2" sslEnabledProtocols="TLSv1.2" SSLEnabled="true"

?

The corresponding document has no recommendations for ciphers. Currently I see the latest Chrome reporting the below problem:

    The connection to this site uses a strong protocol (TLS 1.2), a strong key exchange (ECDHE_RSA with P-256),
    and an obsolete cipher (AES_128_CBC with HMAC-SHA1). 

which means cipher list should be defined. Search over 'Net showed no definite up-to-date recommendations, all I have to do is to try list like

    ciphers="TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
        TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384,
        TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,TLS_RSA_WITH_AES_128_CBC_SHA256,
        TLS_RSA_WITH_AES_128_CBC_SHA,TLS_RSA_WITH_AES_256_CBC_SHA256,
        TLS_RSA_WITH_AES_256_CBC_SHA"

and experiment with adding/deleting ciphers, but if someone has better ideas, I would be glad to know.

1 answer

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1 vote
Answer accepted

Hi Konstantin,


You can test your SSL with this tool. You'll get detailed explanations about insecure things in your SSL setup. After you correct them you should do SSL quality checks on a regular basis to maintain your SSL secure.

The site is private and can't be checked directly (not allowed to do port forwarding to it); however, I tested A+ graded site and got the list of ciphers from the output.

Thanks, the answer is, as usually, obvious.

 

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