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nixos/nginx: use Mozilla Intermediate TLS configuration

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The configuration at https://ssl-config.mozilla.org/#server=nginx&config=intermediate
is reliably kept up-to-date in terms of security and compatible with a
wide range of clients. They've probably had more care and thought put
into them than our defaults, and will be easier to keep updated in
the future.

The only removed (rather than changed) configuration option here is
ssl_ecdh_curve, per https://github.com/mozilla/server-side-tls/issues/189.

Resolves #80952.
This commit is contained in:
Emily 2020-03-06 12:53:37 +00:00
parent 82b54d4906
commit 4ed98d69ed
1 changed files with 14 additions and 6 deletions
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20
nixos/modules/services/web-servers/nginx/default.nix
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@ -87,10 +87,17 @@ let
${optionalString (cfg.sslDhparam != null) "ssl_dhparam ${cfg.sslDhparam};"}
${optionalString (cfg.recommendedTlsSettings) ''
ssl_session_cache shared:SSL:42m;
ssl_session_timeout 23m;
ssl_ecdh_curve secp384r1;
ssl_prefer_server_ciphers on;
# Keep in sync with https://ssl-config.mozilla.org/#server=nginx&config=intermediate
ssl_session_timeout 1d;
ssl_session_cache shared:SSL:10m;
# Breaks forward secrecy: https://github.com/mozilla/server-side-tls/issues/135
ssl_session_tickets off;
# We don't enable insecure ciphers by default, so this allows
# clients to pick the most performant, per https://github.com/mozilla/server-side-tls/issues/260
ssl_prefer_server_ciphers off;
# OCSP stapling
ssl_stapling on;
ssl_stapling_verify on;
''}
@ -487,8 +494,9 @@ in
sslCiphers = mkOption {
type = types.str;
default = "EECDH+aRSA+AESGCM:EDH+aRSA:EECDH+aRSA:+AES256:+AES128:+SHA1:!CAMELLIA:!SEED:!3DES:!DES:!RC4:!eNULL";
description = "Ciphers to choose from when negotiating tls handshakes.";
# Keep in sync with https://ssl-config.mozilla.org/#server=nginx&config=intermediate
default = "ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384";
description = "Ciphers to choose from when negotiating TLS handshakes.";
};
sslProtocols = mkOption {