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39bca053ed
nginx/postfix use a new pre-generated dh2048.pem file. dovecot generates the bits on its own. ssllabs.com reports that TLS_DHE ciphers went from 1024 to 2048 bits as expected. The ECDHE ciphers remain at 256 bits --- no idea what that really means. (This tests nginx only. I haven't tested postfix/dovecot.) see https://discourse.mailinabox.email/t/fips-ready-for-ssl-dhec-key-exchange/76/3
76 lines
3.2 KiB
Plaintext
76 lines
3.2 KiB
Plaintext
# from: https://gist.github.com/konklone/6532544
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###################################################################################
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# Basically the nginx configuration I use at konklone.com.
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# I check it using https://www.ssllabs.com/ssltest/analyze.html?d=konklone.com
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#
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# To provide feedback, please tweet at @konklone or email eric@konklone.com.
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# Comments on gists don't notify the author.
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#
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# Thanks to WubTheCaptain (https://wubthecaptain.eu) for his help and ciphersuites.
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# Thanks to Ilya Grigorik (https://www.igvita.com) for constant inspiration.
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# Path to certificate and private key.
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# The .crt may omit the root CA cert, if it's a standard CA that ships with clients.
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#ssl_certificate /path/to/unified.crt;
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#ssl_certificate_key /path/to/my-private-decrypted.key;
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# Tell browsers to require SSL (warning: difficult to change your mind)
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add_header Strict-Transport-Security max-age=31536000;
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# Prefer certain ciphersuites, to enforce Forward Secrecy and avoid known vulnerabilities.
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#
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# Forces forward secrecy in all browsers and clients that can use TLS,
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# but with a small exception (DES-CBC3-SHA) for IE8/XP users.
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#
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# Reference client: https://www.ssllabs.com/ssltest/analyze.html
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ssl_prefer_server_ciphers on;
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ssl_ciphers 'kEECDH+ECDSA+AES128 kEECDH+ECDSA+AES256 kEECDH+AES128 kEECDH+AES256 kEDH+AES128 kEDH+AES256 DES-CBC3-SHA +SHA !aNULL !eNULL !LOW !MD5 !EXP !DSS !PSK !SRP !kECDH !CAMELLIA !RC4 !SEED';
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# Cut out (the old, broken) SSLv3 entirely.
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# This **excludes IE6 users** and (apparently) Yandexbot.
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# Just comment out if you need to support IE6, bless your soul.
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ssl_protocols TLSv1.2 TLSv1.1 TLSv1;
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# Turn on session resumption, using a 10 min cache shared across nginx processes,
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# as recommended by http://nginx.org/en/docs/http/configuring_https_servers.html
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ssl_session_cache shared:SSL:10m;
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ssl_session_timeout 10m;
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keepalive_timeout 70;
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# Buffer size of 1400 bytes fits in one MTU.
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# nginx 1.5.9+ ONLY
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#ssl_buffer_size 1400;
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# SPDY header compression (0 for none, 9 for slow/heavy compression). Preferred is 6.
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#
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# BUT: header compression is flawed and vulnerable in SPDY versions 1 - 3.
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# Disable with 0, until using a version of nginx with SPDY 4.
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spdy_headers_comp 0;
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# Now let's really get fancy, and pre-generate a 2048 bit random parameter
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# for DH elliptic curves. If not created and specified, default is only 1024 bits.
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#
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# Generated by OpenSSL with the following command:
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# openssl dhparam -outform pem -out dhparam2048.pem 2048
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#
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# Note: raising the bits to 2048 excludes Java 6 clients. Comment out if a problem.
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ssl_dhparam STORAGE_ROOT/ssl/dh2048.pem;
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# OCSP stapling - means nginx will poll the CA for signed OCSP responses,
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# and send them to clients so clients don't make their own OCSP calls.
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# http://en.wikipedia.org/wiki/OCSP_stapling
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#
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# while the ssl_certificate above may omit the root cert if the CA is trusted,
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# ssl_trusted_certificate below must point to a chain of **all** certs
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# in the trust path - (your cert, intermediary certs, root cert)
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#
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# 8.8.8.8 and 8.8.4.4 below are Google's public IPv4 DNS servers.
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# nginx will use them to talk to the CA.
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ssl_stapling on;
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ssl_stapling_verify on;
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resolver 8.8.8.8 8.8.4.4 valid=86400;
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resolver_timeout 10;
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#ssl_trusted_certificate /path/to/all-certs-in-chain.crt;
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