September 2015
Intermediate to advanced
527 pages
14h 8m
English
Content preview from Cloud Computing Networking
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179dynamiC Host serviCe and name serviCe
Management of forwarding: When a local DNS server does not have the required
records, the forwarding service will forward a request to another DNS server. By
default, DNS will attempt to forward the DNS request to the root server. e
forwarding service can be congured to forward the DNS request to a specic
DNS server. Figure 5.14 shows that DNS requests are forwarded to two internal
DNS servers.
5.3.9 DNS Security
Working in the Internet environment, DNS is vulnerable to hackers who can disable a
DNS service by ooding the DNS service with fake DNS responses or requests, steal-
ing information about network resources by misusing the zone les, nding out the
IP address bound to a host name by captu
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