Define IP address inside multi-domain SSL certificate.
Check if the certificate matches DNS name or IP address
Create a multi-domain SSL certificate without a common name.
Use the OpenSSL utility to generate a base64-encoded secret.
Use the native IPsec stack to connect multiple networks over the internet.
Trace packets as they pass through the iptables firewall.
Determine SSL cipher suites supported by the web-server using OpenSSL.
Log every executed command to syslog.