DigiCert announced that March 10, 2026 at 13:00 (Argentina time, UTC-3) will implement an update to the infrastructure of its validation services, including Online Certificate Status Protocol (OCSP) and Certificate Revocation List (CRL). The modification incorporates new IPv4 addresses and assigns dedicated IPv6 addresses, with the aim of strengthening its operational capacity and improving service availability.
This change may impact organizations that use allowlists to control outbound traffic in firewalls, proxies or security groups. In these cases, it will be necessary update network rules and incorporate the new IP addresses before the implementation date. If you fail to do so, certain DigiCert services could stop responding correctly, affecting the validation of the status of digital certificates used within the organization.
DigiCert made available a document with the complete details of addresses, both new and existing, to facilitate this update: DigiCert Certificate Status IP Addresses . There it explains the scope of the changes and their impact in different environments.
For those organizations that do not use allowlists , no action is necessary.
From CertiSur we recommend reviewing network configurations in advance and, if you have any questions, contactar a nuestro equipo de support to assess the impact and ensure a smooth transition.