June 2018
Intermediate to advanced
368 pages
11h 1m
English
Content preview from Managing Mission - Critical Domains and DNS
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Delegation chains
Whenever I start looking at a zone, I do a whois lookup to just quickly validate the delegation of the nameservers and make sure there are no surprises, and then I usually repeat this exercise via dig +trace:
; <<>> DiG 9.8.3-P1 <<>> +trace packtpub.com ;; global options: +cmd . 85241 IN NS e.root-servers.net. . 85241 IN NS l.root-servers.net. . 85241 IN NS m.root-servers.net. . 85241 IN NS a.root-servers.net. . 85241 IN NS h.root-servers.net. . 85241 IN NS k.root-servers.net. . 85241 IN NS b.root-servers.net. . 85241 IN NS g.root-servers.net. . 85241 IN NS d.root-servers.net. . 85241 IN NS i.root-servers.net. . 85241 IN NS f.root-servers.net. . 85241 IN NS j.root-servers.net. . 85241 IN NS c.root-servers.net. ;; Received ...
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