On December 11, 2024, at 08:00 a.m., the Tax Agency will proceed to adapt the cryptographic algorithms of the sub-office " www1.agenciatributaria.gob.es " according to the criteria indicated in the following link Tax Agency: Validation of the headquarters certificate . The remaining sub-venues have already had the appropriate configuration since November 15, 2023. The new configuration can be tested at the test sub-site https://preportal.aeat.es .

 

The cryptographic protocols and algorithms allowed for access to www1.agenciatributaria.gob.es will be:

TLS 1.2

TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384

Please review your installations that act as clients of customs and excise web services, accessing from the Internet, to ensure that they are correctly updated and configured to work with these protocols.
 
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