Don't Forget to Lock the Front Door! Inferring the Deployment of Source Address Validation of Inbound Traffic
Don't Forget to Lock the Front Door! Inferring the Deployment of Source Address Validation of Inbound Traffic
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不要忘记锁好前门!
DOI:
10.1007/978-3-030-44081-7_7
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
C. Langer
中科院分区:
文献类型:
--
作者:
F. Finster;C. Langer
This paper concerns the problem of the absence of ingress filtering at the network edge, one of the main causes of important network security issues. Numerous network operators do not deploy the best current practice—Source Address Validation (SAV) that aims at mitigating these issues. We perform the first Internet-wide active measurement study to enumerate networks not filteringincoming packetsby their source address. The measurement method consists of identifying closed and open DNS resolvers handling requests coming from the outside of the network with the source address from the range assigned inside the network under the test. The proposed method provides the most complete picture of theinboundSAV deployment state at network providers. We reveal that 32 673 Autonomous Systems (ASes) and 197 641 Border Gateway Protocol (BGP) prefixes are vulnerable to spoofing of inbound traffic. Finally, using the data from the Spoofer project and performing an open resolver scan, we compare the filtering policies in both directions.
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DOI:
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期刊:
ACM/SIGCOMM Internet Measurement Conference
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期刊:
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