Assessing Support for DNS-over-TCP in the Wild
Assessing Support for DNS-over-TCP in the Wild
复制标题
评估对 DNS-over-TCP 的实际支持
DOI:
10.1007/978-3-030-98785-5_22
复制
发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Mao, J: Rabinovich
中科院分区:
文献类型:
--
作者:
Mao, J: Rabinovich
While the DNS protocol encompasses both UDP and TCP as its underlying transport, UDP is commonly used in practice. At the same time, increasingly large DNS responses and concerns over amplification denial of service attacks have heightened interest in conducting DNS interactions over TCP. This paper surveys the support for DNS-over-TCP in the deployed DNS infrastructure from several angles. First, we assess resolvers responsible for over 66.2% of the external DNS queries that arrive at a major content delivery network (CDN). We find that 2.7% to 4.8% of the resolvers, contributing around 1.1% to 4.4% of all queries arriving at the CDN from the resolvers we study, do not properly fallback to TCP when instructed by authoritative DNS servers. Should a content provider decide to employ TCP-fallback as the means of switching to DNS-over-TCP, it faces the corresponding loss of its customers. Second, we assess authoritative DNS servers (ADNS) for over 10M domains and many CDNs and find some ADNS, serving some popular websites and a number of CDNs, that do not support DNS-over-TCP. These ADNS would deny service to (RFC-compliant) resolvers that choose to switch to TCP-only interactions. Third, we study the TCP connection reuse behavior of DNS actors and describe a race condition in TCP connection reuse by DNS actors that may become a significant issue should DNS-over-TCP and other TCP-based DNS protocols, such as DNS-over-TLS, become widely used.
登录
查看更多内容
DOI:
10.17487/rfc8555
发表时间:
2019-03
期刊:
RFC
影响因子:
--
作者:
Richard L. Barnes;Jacob Hoffman-Andrews;D. McCarney;James Kasten
通讯作者:
Richard L. Barnes;Jacob Hoffman-Andrews;D. McCarney;James Kasten
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
J. Iyengar;S. Dickinson;M. Shore;C. Huitema;A. Mankin
通讯作者:
A. Mankin
DOI:
--
发表时间:
2018
期刊:
Passive and Active Network Measurement Conference
影响因子:
--
作者:
R. Al;Kyle Schomp
通讯作者:
Kyle Schomp
DOI:
--
发表时间:
2021
期刊:
Passive and Active Network Measurement Conference
影响因子:
--
作者:
G. Moura;M. Müller;Marco Davids;M. Wullink;Cristian Hesselman
通讯作者:
Cristian Hesselman
DOI:
10.17487/rfc7858
发表时间:
2016-05
期刊:
RFC
影响因子:
--
作者:
Zi Hu;Liang Zhu;John S. Heidemann;A. Mankin;Duane Wessels;Paul E. Hoffman
通讯作者:
Zi Hu;Liang Zhu;John S. Heidemann;A. Mankin;Duane Wessels;Paul E. Hoffman