Abstract
Estimating network distance between arbitrary Internet endpoints is an essential primitive in applications ranging from performance optimization to network debugging and auditing. Enabling such a primitive without deploying new infrastructure was demonstrated via DNS. However, the proliferation of DNS hosting has made DNS-based measurement techniques far less dependable. In this paper, we show that the heterogeneous infrastructure of different CDNs, combined with the proliferation of the EDNS0 client-subnet extension (ECS), enables novel infrastructureless measurement. We design Fury Route, a system that estimates network distance by utilizing ECS to construct a virtual path between endpoints via intermediate CDN replicas.
Fury Route requires no additional infrastructure to be deployed. The measured endpoints do not need to participate by sending or responding to probes. Fury Route further generates no load on endpoints. It only queries DNS, whose infrastructure is designed for large loads. We extensively evaluate Fury Route and demonstrate that (i) the key to Fury Route’s ability to construct virtual paths lies in the heterogeneity of the underlying CDNs, (ii) Fury Route is effective in revealing relative network distance, needed in many real-world scenarios, (iii) caching can dramatically reduce Fury Route’s DNS overhead, making it a useful system in practice.
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Notes
- 1.
Akamai, a large provider, restricts third-party ECS queries, and is not used.
- 2.
The target set can contain more CDN replicas than the number of providers, because a provider may return more than a single replica for a host.
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Flores, M., Wenzel, A., Chen, K., Kuzmanovic, A. (2018). Fury Route: Leveraging CDNs to Remotely Measure Network Distance. In: Beverly, R., Smaragdakis, G., Feldmann, A. (eds) Passive and Active Measurement. PAM 2018. Lecture Notes in Computer Science(), vol 10771. Springer, Cham. https://doi.org/10.1007/978-3-319-76481-8_7
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DOI: https://doi.org/10.1007/978-3-319-76481-8_7
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