A free set of online tools to help with IP addressing and subnetting.

DNS validation allows for certificate issuance requests to be verified using DNS records, rather than by serving content over HTTP. The acme-dns-certbot tool…

Domainr is the only ICANN-accredited domain status API provider.

With direct, privileged access to domain registry data, the Domainr API instantly checks if a domain is available—with no false positives. In milliseconds, your customers will know if a domain is available, premium-priced, or for sale in any major aftermarket.

If you’re a security provider or manage a software supply chain, the Domainr API can help you monitor critical domains, alert you to any changes to their status, and uncover at-risk domains before they change hands.

Adding custom domains to your Bear blog

🐻 This includes info on using A or CNAME records for your Bear blog.

It's always DNS.