If you run a security scan (e.g. Nessus) against a Domino HTTP / SMTP Server you might get the following result:
Hostname: "Domino1" (xxx.xxx.xxx.xxx)
Plugin name: "SSL/TLS Protocol Initialization Vector Implementation Information Disclosure Vulnerability"
Risk factor: Medium
Fixing this "issue" is quite easy:
The solution for that is to prevent SSL connections from renegotiating. This must be done via the notes.ini key SSL_DISABLE_RENEGOTIATE=1. After this is set you need to restart the domino server.