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All,

I'm running httpd 2.2.31 on Amazon Linux, and the docs for
SSLCertificateFile say:

"
Beginning with version 2.2.30, mod_ssl makes use of standardized DH
parameters with prime lengths of 2048, 3072, 4096, 6144 and 8192 bits
(from RFC 3526), and hands them out to clients based on the length of
the certificate's RSA/DSA key.
"

I have a 4096-bit RSA key and yet I'm not getting a 100% on SSL Labs'
SSL testing tool. That suggests that the DH parameter strength is less
than what I was expecting: 4096-bit (or equivalent).

How does httpd determine which DH primes to use based upon the RSA
key? The server's key is 4096-bit, but the issuer's key (in the chain)
is 2048-bit. Is that the reason SSL Test is not giving me full marks?

I'm trying to create a 4096-bit parameters file (to attach to the RSA
key chain), but it's taking a while so I figured I'd ask in the meantime
.

Thanks!

- -chris

PS I'll see some of you in Miami!
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