Through its 2025 annual report four main chapters - key figures, highlights, governance and annual accounts – the Restena Foundation highlights its main activities mainly related to the high-speed communications network interconnected with European and worldwide research networks it designs and operates, and management of the national top-level domain .lu.

Driven by the commitment of a team made of 23 employees, the year 2025 was marked by numerous achievements. Among them were several new ones.

• The connection of the national research and education network – the RESTENA network – to the GÉANT network’s Points of Presence (POPs) in Belgium and Germany directly via fibre optic cable.
• The renewal – and transition to the ISO/IEC 27001:2022 standard – of the ISO 27001 certification cycle for its Information Security Management System (ISMS).
• The publication of a tip sheet aimed at organisations with only a low budget wishing to set up a Security Operations Centre (SOC).
• The launch of the ‘DNS firewall’ service, made up of a pre-configured, customisable DNS firewall designed to protect IT networks from cyber threats by preventing accidental access to websites hosting malware, for example. A few months after its launch, the service is being used by Luxembourg secondary schools at the request of the Ministry of Education, Children and Youth and the Centre de Gestion Informatique de l’Éducation (CGIE).
• The integration of the CFL as an eduroam service provider, enabling members of the research and education community, including those from abroad, to be automatically connected to eduroam when visiting a station where the eduroam signal is available.
• Active participation – as a member – in the European Top-Level Domain Information Sharing and Analysis Centre (European TLD ISAC). This initiative was established within CENTR, the association dedicated to the exchange, dialogue and innovation of European top-level domain registries, of which Restena is a member. It brings together top-level domain registries to share information, strengthen security and improve resilience against emerging risks.

At the same time, 2025 was marked by the acceptance of the proposal submitted by Restena, together with its European counterparts from the research and education network community grouped within the European association GÉANT, in response to the public call for tenders issued by the European High Performance Computing Joint Undertaking (EuroHPC JU). A contract has therefore been signed with the GÉANT association, and the increase in existing connection capacity to meet the European targets hoped for by 2025 will therefore take place from 2026 onwards and will benefit MeluXina, the Luxembourg supercomputer, when the RESTENA network will be upgraded from 100 to 200 Gigabits per second (Gbps).