DNS

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Revision as of 10:44, 3 October 2023 by Tony (talk | contribs) (→‎Tools)
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Links

DNS chcecks

Documentation

Zone files

Glue records

Software

BIND

Maradns

A nice caching DNS.

Tools

dnstop

Show what is being looked up

dnstop -l 3 eth0

and then hit 3

  • Dig
  • dnsping
  • dnsdiag

FAQ

Get hints file

dig @m.root-servers.net. ns .

Find server handling reverse

dig -x 10.11.12.13

Wildcard record

;seems unwise to use CNAMES for this
@ IN A 10.0.0.1
* IN A 10.0.0.1

 

DNS amplification test

dig +short +tries=1 +time=2 test.openresolver.com TXT @$ip


Local NS list does not match Parent NS list

Probably a slave/secundary server out of sync

Terms

SOA

Start Of Authority