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Fix weak DH configuration

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The SSLLabs https://www.ssllabs.com/ssltest/ test reported a B rating for
our SSL configuration, mostly due to the weak DH confiugration we have,
which is vulnerable to the logjam attack. This is their recommended
configuration for nginx.

From: https://weakdh.org/sysadmin.html

This has been verified to work with docker 0.10.0.
This commit is contained in:
Matt Jibson 2015-08-07 12:03:05 -04:00
parent 44584ff0d8
commit c88edf8989
2 changed files with 10 additions and 1 deletions
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8
conf/dhparams.pem Normal file
View file

@ -0,0 +1,8 @@
-----BEGIN DH PARAMETERS-----
MIIBCAKCAQEAk7fEh4MFr446aU61ZGxCl8VHvcJhDGcdd+3zaNxdWF7Wvr5QE8zX
QswoM5K2szlK7klcJOXer2IToHHQQn00nuWO3m6quZGV6EPbRmRKfRGa8pzSwH+R
Ph0OUpEQPh7zvegeVwEbrblD7i53ookbHlYGtxsPb28Y06OP5/xpks9C815Zy4gy
tx2yHi4FkFo52yErBF9jD/glsZYVHCo42LFrVGa5/7V0g++fG8yXCrBnqmz2d8FF
uU6/KJcmDCUn1m3mDfcf5HgeXSIsukW/XMZ3l9w1fdluJRwdEE9W2ePgqMiG3eC0
2T1sPfXCdXPQ7/5Gzf1eMtRZ/McipxVbgwIBAg==
-----END DH PARAMETERS-----

3
conf/nginx.conf
View file

@ -9,11 +9,12 @@ http {
ssl_certificate ./stack/ssl.cert; ssl_certificate ./stack/ssl.cert;
ssl_certificate_key ./stack/ssl.key; ssl_certificate_key ./stack/ssl.key;
ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4"; ssl_ciphers 'ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA';
ssl_protocols TLSv1 TLSv1.1 TLSv1.2; ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_session_cache shared:SSL:10m; ssl_session_cache shared:SSL:10m;
ssl_session_timeout 5m; ssl_session_timeout 5m;
ssl_prefer_server_ciphers on; ssl_prefer_server_ciphers on;
ssl_dhparam dhparams.pem;
# TODO: learn wtf OCSP stapling is and do it the right way # TODO: learn wtf OCSP stapling is and do it the right way
#ssl_stapling on; #ssl_stapling on;