Link11 is a specialized European IT security provider in the field of cyber-resilience headquartered in Germany, with sites worldwide in Europe, North America, Asia and the Middle East.

Link11 is a specialized European IT security provider protecting web services and infrastructures against cyber-attacks. Headquartered in Germany, Link11 maintains global locations, including in Europe, North America, and Asia. The company’s cloud-based IT security services help customers avoid business disruptions and strengthen the cyber-resilience of their business networks and critical applications.

Link11’s product portfolio includes a wide range of security services, such as web and infrastructure DDoS protection, Bot Management, Zero-Touch WAF, and Secure CDN Services. According to unanimous analyst opinion (Frost & Sullivan, Gartner a. o.), Link11 offers high-performance mitigation across all layers and for all attack vectors, including unknown ones, within seconds.

The technological basis for this is Link11’s patented DDoS protection, which relies on machine learning and consistent automation. The company’s global multi-terabit network, which currently has 41+ PoPs (Points of Presence), interconnects the DDoS filter clusters, and is monitored 24/7 by the Link11 Security Operations Center.  

The German Federal Office for Information Security (BSI) recognizes Link11 as a qualified DDoS protection provider for critical infrastructures. With ISO certification 27001, the company also offers high-level data security processes. Since being founded in 2005, Link11 has received multiple awards for its innovative solutions and business growth. 

Our Global Network

  • A total of 41+ POPs worldwide including scrubbing centers and nodes

  • IP connection to leading Tier 1 & 2 carriers

  • 24/7 Link11 Ops Model via own staff in two Network Operation Centers in Frankfurt and Vancouver

  • Multiple private peering relationships with major entities

  • Self-built cloud security platform, based on a Juniper network and premium server hardware

  • Self-engineered software as a complete in-house development running on the Link11 filter cloud

  • Links to the main public Internet exchange points


The Link11 Management Board

Working hand in hand with a powerful team, the management board steers Link11 into the future. Jens-Philipp Jung and Karsten Desler have been building the company and ensuring its success since 2005. Each of the managing directors brings their individual strengths, passions and expert knowledge to the company.

Jens-Philipp Jung


Co-founder Jens-Philipp Jung serves as a managing director of the Link11 GmbH based in Frankfurt am Main and is responsible for commercial operations. He is a renowned IT expert and a contributor to the ICT strategy of the Federal Ministry of Education. As one of the youngest entrepreneurs of Baden-Württemberg, Jung founded his first IT company while still in school. Within the regional section of Die Jungen Unternehmer (“young entrepreneurs”), he works with dedication to promote optimal entrepreneurial conditions in Germany.

Karsten Desler


Co-founder and managing director Karsten Desler’s responsibility at Link11 is the continuing technical development process. Patents have been filed for three features of his multi-award-winning Link11 DDoS protection solution. Apart from the continuing development of DDoS protection technology, his role encompasses system and network administration duties for the server hosting and CDN services. He co-founded Link11 GmbH with Jens-Philipp Jung in 2005, when he was still studying computer science.

Proven Excellency – Our Awards

As an IT expert, Link11 wins customers first and foremost through innovative solutions and a reliable and local customer service. In
addition to DAX groups, numerous leading companies from the e-commerce, finance and insurance, media, and production
industries trust in Link11’s unique DDoS protection.

That is why it is always an especially great honor for us here at Link11 when we receive awards in the fight against cyber criminality.


Become an expert for DDoS protection with Link11 and expand your portfolio with a strong partner that has redefined DDoS protection.


Shape the future of IT security together with us! We would be happy if you apply for one of the available jobs and we can get to know each other personally.

Securing Carbon Neutrality 

Link11 Goes Green! This is our motto to make the company climate neutral and to do more for our environment. Because one thing is clear: In the end, we all benefit from a healthy world!


  • August 21, 2023

DDoS-Report for the 1st Half of 2023

AI-based attacks are increasing in number and threaten critical infrastructures Over 70 percent increase in DDoS attacks (H1 2023) in Link11 network increases digital resilience requirements of enterprises. Registered DDoS attacks reach critical volume after an average of 60 seconds in H1 2023 (2022: 93 seconds) – an increasing share of HTTPS attacks to 30% […]