- Deploying DNS service
Dns (domain name system) DNS: DNS
early resolve the domain name with the hosts file
C drive --windows - system32 - drivers - etc --hosts file
. 1.1 domain spatial structure
level of the tree
root domain. " "
top-level domain net network services; edu educational institutions; com company; gov government units; mil military; org civil society organizations
second-level domain
FQDN = hostname .dns suffix
1.2 DNS server category.
primary name server: the storage area the DNS server settings, which is stored in the area of the original data file
assisted name services: copying data from other servers; the data bits can not be modified copy of
the master name server: providing data tend to copy the DNS server
Cache - only name server
. 1.3 dNS query process
query: recursive query (and the interaction between local dns server); iterative query
query: forward inquiry (by the domain name check IP address); repercussions query (query domain name by the IP address)
1.4. manage the dNS
. 1.4.1 Creating dns service on the server:
configure the server IP address - to create server
1.4.2 Configuring dns
tools --dns-- create a zone - Create a forward New Host (A)
alias record (CNAME)
client authentication: cmd: nslookup hostname
reverse record:
New Pointer PTR:
1.4.3 subdomains
may be the same network of different users into different sub-domains
to create sub-domains: Right-created region - create new domain - subdomain name
1.4.4 delegate its configuration
excessive regional neutron domain
domain name queries bottlenecks
delegate: delegate subdomains to other servers
Sub Server: Creating the environment and new domain (subdomain); the main server to create a new delegate
Secondary DNS server settings: synchronous data (transfer area)
property right forward region A - transport area - selection only to the following servers - Edit - IP address of the secondary DNS server
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Job:
2.1.1 Dns resource record types:.
Soa: defines the authoritative name servers in the domain
NS: SQA represents an authoritative server and a region in the development of the main and secondary servers in the region
A: a list of area FQDN (fully qualified domain name) to IP address mapping
Ptr: with respect to the record a resource, PTR record is the IP address mapping to the FQDN
Mx:. mail exchange records, exchanging the host to provide message routing to the designated mail
SRV: lists provide targeted services server
Cname: multiple names are mapped to the same computer, user-friendly access
Subdomains and delegate the difference between
resource sub-domains in the file of the parent domain, the authoritative server in a child domain is the authoritative server for the parent domain
appoint an independent zone files to a new field specifies the new authoritative server
What is recursive queries, and iterative queries
recursive query: the client get the results can only be success or failure of
an iterative query: DNS server if the client requests data correct address is returned; no request is a pointer return