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Nginx + SSL problem for old browsers

Posted by sh4ka 
sh4ka
Nginx + SSL problem for old browsers
November 23, 2017 04:10PM
Hello everybody,

I have one single website running a RapidSSL certificate, that doesn't work
on old mobile phones and browsers, like Symbian. My customer, however,
insist in having this site with SSL fully compatible with old browsers.

I am already using and old cipher for old browsers generated at
https://mozilla.github.io/server-side-tls/ssl-config-generator/

However, still doesn't work.

Just in case, on the same server I serve lot of other SSL certificates, all
sharing the same IP.

This is my current Nginx configuration for this site :

# SSL config
listen 443 ssl;
ssl on;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers
'ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305: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:ECDHE-RSA-DES-CBC3-SHA:ECDHE-ECDSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:DES-CBC3-SHA:HIGH:SEED:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!RSAPSK:!aDH:!aECDH:!EDH-DSS-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA:!SRP';
ssl_prefer_server_ciphers On;
ssl_dhparam /etc/nginx/dhparams.pem;
ssl_certificate /etc/nginx/ssl.crt/www.mysite.com.crt;
ssl_certificate_key /etc/nginx/ssl.key/www.mysite.com.key;
ssl_session_cache shared:SSL:20m;
ssl_session_timeout 10m;
# SSL config

Thanks

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,277461,277461#msg-277461

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sh4ka
Re: Nginx + SSL problem for old browsers
November 23, 2017 04:20PM
Could this be because of the lack of SNI support on old browsers?

Thanks

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,277461,277463#msg-277463

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Reinis Rozitis
RE: Nginx + SSL problem for old browsers
November 24, 2017 11:30AM
> Could this be because of the lack of SNI support on old browsers?

It's possible.
But you should be able to tell on the client itself - if there is ssl cert domain mismatch or the client can't connect at all.

Imo the easiest way to check https://www.ssllabs.com/ssltest/

p.s. newer Openssl (1.1.x) versions by default disable weak ciphers. So depending on how your nginx/openssl is compiled the actual cipher list might be different to the configuration line.

rr

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