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Regional internet registry RIPE NCC is warning of a credential-stuffing attack against its single sign-on service, RIPE NCC Access, and is encouraging users to implement two-factor authentication (2FA). Click to Register Located in Amsterdam, the Réseaux IP Européens Network Coordination Centre (RIPE NCC) is the regional internet registry for Europe, Western Asia and the former Soviet Union. RIPE NCC said that the attack, which occurred last weekend, caused “some downtime.” However, it said that preliminary investigations do not yet reveal that any single sign-on (SSO) accounts have been compromised. “We would like to ask you to enable two-factor authentication on your RIPE NCC Access account if you have not already done so, to ensure that your account is secure,” the RIPE NCC told account holders in a Thursday security notice. “In general, using two-factor authentication across all your accounts can help limit your exposure to such attacks.” What is RIPE NCC? A regional internet registry is an organization that manages the registration of internet number resources within various regions worldwide. Such “internet number resources” include IPv4 and IPv6 addresses – which provide the underlying technology making it possible for people to connect their devices to the web — and autonomous system numbers (ASNs), which uniquely identify each network on the internet. RIPE NCC is one of five regional internet registries providing internet resource allocations and registration…

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