DNS
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Recursion
Recursion is the term used when a DNS server queries another DNS servers in order to deliver a result back to the user. Allowing recursion for any source address may allow the DNS server to be used in a DDoS. As a result it is recommended that recursion only be permitted for local clients.
Best practice recommends that
Split DNS/Views
- Use of Split DNS
- Use of Views
Internal DNS
- Use of DNS universally inside network
DMZ
- Use of DNS within the DMZ
Reverse DNS
- Use of Reverse DNS
