ARIN Now Only Supports TLS 1.2 and TLS 1.3 Cryptographic Features Across All ARIN Services

Posted: Tuesday, 04 February 2025

As of 4 February 2025, ARIN has deprecated outdated versions of Secure Socket Layer (SSL) and Transport Layer Security (TLS) and is only using TLS 1.2 and TLS 1.3 protocols across all our services.

Those deprecated protocols include TLS 1.0, TLS 1.1, and SSLv3, which were previously supported for publicly available services such as ARIN.net mail, Whois-RESTful Web Service (Whois-RWS), Registration Data Access Protocol (RDAP), ftp.arin.net, and Resource Public Key Infrastructure Repository Delta Protocol (RRDP).

In the future, ARIN may more regularly update cipher suite and algorithm support within our published supported protocols to align with requirements from internal and external audits, security certifications, and community feedback.

Regards,

American Registry for Internet Numbers (ARIN)