Let's Encrypt rolls out free IP address certificates
Briefly

Let's Encrypt has begun offering free digital certificates for IP addresses, which aligns with services previously provided by other certificate authorities. These certificates allow those with static IP addresses to establish secure connections without incurring the cost of a domain name. Directly entering numeric IP addresses in web browsers typically results in errors unless fulfilled by IP address certificates that convert them into secure connections. However, the text-based domain names are preferred due to ease of management, as IP addresses can change frequently and require additional redirects, impacting performance and SEO.
Let's Encrypt has started issuing digital certificates for IP addresses at no cost, providing a secure connection for users without needing a domain name.
Having an IP address certificate allows users with static IP addresses to host websites securely, avoiding the cost of domain names while offering numeric identifiers.
Read at Theregister
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