Owners manual

Rack Power Filter: Administration: Network Features64
DNS
Path: Administration > Network > DNS > options
Use the options under DNS to configure and test the Domain Name System (DNS):
• Select
Primary DNS Server or Secondary DNS Server to specify the IPv4 or IPv6 addresses of the
primary and optional secondary DNS server. For the Rack Power Filter to send e-mail, you must
at least define the IP
address of the primary DNS server.
– The Rack Power Filter waits up to 15 seconds for a response from the primary DNS server or
the secondary DNS server (if a secondary DNS server is specified). If the Rack Power Filter
does not receive a response within that time, e-mail cannot be sent. Therefore, use DNS
servers on the same segment as the Rack Power Filter or on a nearby segment (but not across a
wide-area network [WAN]).
– After you define the IP addresses of the DNS servers, verify that DNS is working correctly by
entering the DNS name of a computer on your network to look up the IP address for that
computer.
• Host Name: After you configure a host name here and a domain name in the Domain Name field,
users can enter a host name in any field in the
NMC interface (except e-mail addresses) that
accepts a domain name.
• Domain Name (IPv4): You need to configure the domain name here only. In all other fields in the
NMC interface (except e-mail addresses) that accept domain names, the NMC adds this domain
name when only a host name is entered.
– To override all instances of the expansion of a specified host name by the addition of the
domain name, set the domain name field to its default, somedomain.com, or to 0.0.0.0.
– To override the expansion of a specific host name entry (for example, when defining a trap
receiver), include a trailing period. The
NMC recognizes a host name with a trailing period
(such as mySnmpServer.) as if it were a fully-qualified domain name and does not append
the domain name.
• Domain Name (IPv6): Specify the IPv6 domain name here.
• Select
test to send a DNS query that tests the setup of your DNS servers:
–As Query Type, select the method to use for the DNS query:
• by Host: the URL name of the server
• by FQDN: the fully-qualified domain name
• by IP: the IP address of the server
• by MX: the Mail Exchange used by the server
–As Query Question, identify the value to be used for the selected query type:
– View the result of the test DNS request in the Last Query Response field.
Query Type Selected Query Question to Use
by Host The URL
by FQDN The fully qualified domain name, my_server.my_domain
by IP The IP address
by MX The Mail Exchange address