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Defeating DNS/UDP Fragmentation Attacks

Document Type Expired Internet-Draft (individual)
Expired & archived
Author Mark P. Andrews
Last updated 2020-01-03 (Latest revision 2019-07-02)
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


It is possible to force a DNS server to fragment its response such that a fragmentation reassembly attack can insert records into the response. This document uses TSIG with a well known key to defeat such attacks.


Mark P. Andrews

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)