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- W3204348757 abstract "Many systems today rely heavily on virtual private network (VPN) technology to connect networks and protect their services on the Internet. While prior studies compare the performance of different implementations, they do not consider adversarial settings. To address this gap, we evaluate the resilience of VPN implementations to flooding-based denial-of-service (DoS) attacks. We focus on a class of stateless flooding attacks, which are particularly threatening to real connections, as they can be carried out by an off-path attacker using spoofed IP addresses. We have implemented various attacks to evaluate DoS resilience for three major open-source VPN solutions, with surprising results: On high-performance hardware with a $40,mathrm{Gb/s}$ interface, data transfer over established WireGuard connections can be fully denied with $700,mathrm{Mb/s}$ of attack traffic. For strongSwan (IPsec), an adversary can block any legitimate connections from being established using only $75,mathrm{Mb/s}$ of attack traffic. OpenVPN can be overwhelmed with $100,mathrm{Mb/s}$ of flood traffic denying data transfer through the VPN connection as well as connection establishment completely. Further analysis has revealed implementation bugs and major inefficiencies in the implementations related to concurrency aspects. These findings demonstrate a need for more adversarial testing of VPN implementations with respect to DoS resilience." @default.
- W3204348757 created "2021-10-11" @default.
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- W3204348757 date "2022-01-01" @default.
- W3204348757 modified "2023-09-25" @default.
- W3204348757 title "Evaluating Susceptibility of VPN Implementations to DoS Attacks Using Adversarial Testing" @default.
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- W3204348757 doi "https://doi.org/10.14722/ndss.2022.24043" @default.
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