Domain registrars & DNS servers Post: 302959579

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Operating Systems Linux Domain registrars & DNS servers Post 302959579 by cjcox on Wednesday 4th of November 2015 03:33:04 PM

11-04-2015

Registered User

Think of nameservers as something different (but not necessarily) from your domain.

It's the DNS that holds the zone data for your somedomain.com. To make that official as far as the Internet goes that's why they are asking where your records go... that is what nameservers house the records.

Anymore unless the company is sizable, I chose to use a world wide redundant DNS service (multiple DNS servers with redundance) to house records for a domain (e.g. DNSMadeEasy for example). But as I alluded to earlier you can certainly host your own DNS server(s) (they like for you to have more than one if possible).

When DNS queries are made, ulimately thigns work from the root server down to the tld's etc... and along those paths, your case .com knows who (what DNS servers) stands authoritative for somedomain.com.

With that said, you or anyone else can choose to point to a DNS that "says" it stands authoritative for records for whoever (somedomain.com, mil.gov, etc)... if if that is your DNS that your pointing to you'll get back whatever name to IP (etc) that you have defined there.

Hope that wasn't too confusing.

Maybe another example. The Whitepages is a phone book. I could print my own phone book and change anyone's phone number I want. But this doesn't work at large because chances are people are using the official whitepages and not my hacked up copy.

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LEARN ABOUT SUSE

tnm::dns

dns(n)								 Tnm Tcl Extension							    dns(n)

__________________________________________________________________________________________________________________________________________________

NAME

       dns - Query the Domain Name System of the Internet.
_________________________________________________________________

DESCRIPTION

       The  dns  command  allows  to query the Internet Domain Name System (DNS) (RFC 1034, RFC 1035, RFC 974, RFC 1912) for host information. The
       main purpose of this command is to convert host names into IP addresses and vice versa. The dns command also allows to retrieve host infor-
       mation records as well as mail exchanger records.

DNS COMMAND

       dns [options]
	      Invoking	the  dns  command with options but without any command arguments allows to retrieve and change the default values. See the
	      description of supported options below. Default values are bound to a Tcl interpreter which allows to have multiple Tcl  interpreter
	      with different defaults.

       dns [options] address host
	      The  dns	address  command  sends  a query to retrieve the address record for the specified host. The command returns the list of IP
	      addresses for the given host name.

       dns [options] name address
	      The dns name command sends a query to retrieve the domain name pointer record. A pointer record maps an IP address to a fully quali-
	      fied domain name (FQDN). The command returns the fully qualified domain name for the given IP address.

       dns [options] hinfo name
	      The dns hinfo command sends a query to retrieve the host information record. The command returns a list containing two elements. The
	      first element describes the hardware type and the second element the operating system.

       dns [options] mx name
	      The dns mx command sends a query to retrieve the mail exchanger record. The command returns a list of mail exchanger records if name
	      is  a domain name for which one or more MX records exist. Each element of this list contains a full qualified domain name (FQDN) and
	      its priority.

       dns [options] soa name
	      The dns soa command sends a query to retrieve the start of authority record for a DNS domain. The command returns the  name  of  the
	      authoritative DNS server of the DNS domain name.

DNS OPTIONS

       -server server
	      The  -server  option  defines  the DNS server which will be used to process the request. The default value is the default DNS server
	      configured on the local system.

       -timeout time
	      The -timeout option defines the time the dns command will wait for a response. The time is defined in seconds with a  default  of  2
	      seconds.

       -retries number
	      The  -retries option defines how many times a request is retransmitted during the timeout interval. The default number of retries is
	      2.  Please note, that many resolver double the last timeout after every retry.

SEE ALSO

       scotty(1), Tnm(n), Tcl(n)

AUTHORS

       Erik Schoenfelder <schoenfr@gaertner.de>
       Juergen Schoenwaelder <schoenw@cs.utwente.nl>

Tnm																	    dns(n)