Rule ID
SV-285266r1258711_rule
Version
V1R1
CCIs
Most enterprises have an authoritative primary server and a host of authoritative secondary name servers. It is essential that these authoritative name servers for an enterprise be located on different network segments. This dispersion ensures the availability of an authoritative name server not only in situations in which a particular router or switch fails, but also during events involving an attack on an entire network segment. A network administrator may choose to use a "hidden" master authoritative server and only have secondary servers visible on the network. A hidden master authoritative server is an authoritative DNS server whose IP address does not appear in the name server set for a zone. If the master authoritative name server is "hidden", a secondary authoritative name server may reside on the same network as the hidden master.
Verify Infoblox is configured so that DNS service members that are authoritative for a zone are on different network segments and are assigned different IP addresses. 1. Navigate to Data Management >> DNS >> Zones tab. 2. Select the zone to review. 3. Select the "Name Servers" tab. If all authoritative DNS service members are not located on different network segments, this is a finding.
1. Navigate to Data Management >> DNS >> Zones tab. 2. Verify zone settings by selecting each zone and reviewing the "Name Server" tab to ensure all DNS service members are located on different network segments and assigned different IP addresses.