Information Technology Grimoire

Version .0.0.1

IT Notes from various projects because I forget, and hopefully they help you too.

DNS Record Types

TypeDescription
AAddress mapping (name -> IPv4)
AAAAAddress mapping (name -> IPv6)
CNAMECanonical Name (alias)
DNAMESubtree lookup
MXMail server
NSName server (DNS resolution)
SOAStart of Authority (top level domain information)
SRVGeneric service record (e.g. instead of MX)
TXTGeneric text record (e.g. SPF, DKIM, DMARC, etc)
HINFOHost information (CPU, OS, etc.), but not commonly available
CAACA Authorization (CAs for a domain)
IPSECKEYAn IPSec key J
PTRAddress mapping (reverse lookups)
DNSSIGDNSSEC signature
NSEC/NSEC3DNSSEC Non-existence