> On Apr 15, 2018, at 5:06 PM, Benjamin Kaduk <ka...@mit.edu> wrote:
> 
> IIUC a fixed DH certificate is incompatible with TLS 1.3 but can be
> TLS 1.2-compatible.

Yes, you're right, TLS 1.3 dropped fixed-dh support, but we've a while back 
dropped support for all the (authenticated) corresponding TLS 1.2 ciphers!

  $ OpenSSL_master/bin/openssl ciphers -stdname -v ALL | grep _DH_ | awk 
'{print $1}'
  TLS_DH_anon_WITH_AES_256_GCM_SHA384
  TLS_DH_anon_WITH_AES_128_GCM_SHA256
  TLS_DH_anon_WITH_AES_256_CBC_SHA256
  TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA256
  TLS_DH_anon_WITH_AES_128_CBC_SHA256
  TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA256
  TLS_DH_anon_WITH_AES_256_CBC_SHA
  TLS_DH_anon_WITH_CAMELLIA_256_CBC_SHA
  TLS_DH_anon_WITH_AES_128_CBC_SHA
  TLS_DH_anon_WITH_SEED_CBC_SHA
  TLS_DH_anon_WITH_CAMELLIA_128_CBC_SHA

We should perhaps also drop the fixed DH anon ones too, leaving them in might 
have been inadvertent.

-- 
        Viktor.

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