Enable SSL session caching by default in Nginx configuration
SSL session caching is not enabled by default in Plesk's Nginx configuration, leading to the warning “Session resumption (caching): No (IDs assigned but not accepted)” during SSL testing (e.g., SSLLabs test). Without SSL session caching, SSL/TLS handshakes take longer and consume additional resources, impacting performance for returning users.
The following settings are missing in the Nginx SSL configuration file (/etc/nginx/conf.d/ssl.conf):
sslsessioncache shared:SSL:32m;
sslsessiontimeout 1m;
Steps to Reproduce:
- Run SSL configuration tests, such as with SSLLabs, and observe the “Session resumption” section.
- Note the warning “Session resumption (caching): No (IDs assigned but not accepted)”, indicating the lack of caching.
Could you please enable SSL session caching by default?
Plesk Tech Support
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-- SH