On 15 October 2019 and 13 January 2020, we announced plans to implement
a change with ARIN’s Whois-RWS and RDAP services. We noted that this
change may impact the way you interface programmatically with ARIN to
query and retrieve information from these services.
With this change, ARIN no longer supports TLS version 1.0 for Whois-RWS
and RDAP services because of well-known security issues with this
protocol. We will continue to support TLS 1.1 and 1.2. Please make sure
your client implementation will support TLS 1.1 or 1.2. Read
https://datatracker.ietf.org/doc/draft-ietf-tls-oldversions-deprecate/
for further details.
ARIN implemented these changes to remove TLS 1.0 support on 12 February
2020. We recommend that you review your clients that interface with the
Whois-RWS and RDAP services, and verify that your clients are operating
successfully with ARIN.
If you are still using TLS 1.0, you will need to make configuration
changes to use TLS 1.1 or TLS 1.2 to successfully interface with ARIN.
If you have additional questions, comments, or issues, please submit an
Ask ARIN ticket using your ARIN Online account, or contact the
Registration Services Help Desk by phone Monday through Friday, 7:00 AM
to 7:00 PM ET at +1.703.227.0660.
Regards,
Mark Kosters
Chief Technology Officer
American Registry for Internet Numbers (ARIN)
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