TXT resource record
A freely definable text can be stored in a DNS zone with a TXT resource record .
construction
- Surname
- for example a server name
- TTL
- specifies how long the RR can be kept in the cache
- IN
- Internet
- TXT
- text
- Freely definable text.
example
server1.example.com. 3600 IN TXT "Hello World"
This is z. B. used for SPF records - but there was also a dedicated SPF record type at times .
At the 21C3 there was a lecture in which it was described how TXT records etc. a. can be used for tunneling via DNS.
Web links
- RFC 1464 - Using the Domain Name System To Store Arbitrary String Attributes
Individual evidence
- ^ 21st Chaos Communication Congress. Black Ops of DNS. Chaos Computer Club e. V., 2004, accessed on May 1, 2019 .