DNS

Links

• The O'Reilly Bind Book
• DNS Howto
• DNS Check
• http://www.dns.net/dnsrd/
• Dig HOWTO
• DNS tips&tricks
• DNS entropy
• Configuring reverse dns
• DNS subdomains
• What's EDNS All About (And Why Should I Care)?

DNS chcecks

• Domain Check
• mtoolbox dns check
• dnviz

Documentation

Zone files

• Anatomy of a bind zone file

Glue records

• Glue Records and Dedicated DNS

Software

BIND

• Bind homepage

Maradns

A nice caching DNS.

• http://www.maradns.org/

Tools

dnstop

Show what is being looked up

dnstop -l 3 eth0

and then hit 3

• Dig
• dnsping
• dnsdiag
• dnzviz

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
      

• Understanding SOA records