Security
Nginx TLS SNI routing - based on subdomain pattern
Nginx can be configured to route to a backend, based on the server's domain name, which is included in the SSL/TLS handshake (Server Name Indication, SNI).
nftables geoip - continents ip
nftables and GeoIP
How nftables log to external file
OCSP Stapling on Nginx and Apache webserver
Explanation DMARC (Domain-based Message Authentication, Reporting and Conformance) in all details
Explanation SPF (Sender Policy Framework) in all details
Explanation DKIM (DomainKeys Identified Mail) in all details
What is email envelope and email header
Add or Change SSL/TLS certificate in Lotus Domino
