TheDNSMuseum
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Tunnelling

DNS tunnelling

Data moved through DNS queries and answers instead of its usual transport.

tunnellingtransportrecord types

Screenshot used in the talk for DNS tunnelling
Screenshot used in the original talk.

DNS tunnelling encodes data into query names and responses, then uses DNS as a transport channel. The idea was discussed publicly as early as 2000.

Many record types can carry pieces of a tunnel. The later entries in this section show what people built on top of that basic pattern.

Primary source: https://www.daemon.be/maarten/dnstunnel.html