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 Stay Connected: 
DNS Tools - Core Description - Last Review: November 8, 2011
Purpose of this tool:
Tool Capabilities - Simple Query using your default DNS
Watch a demonstration video of Simple Query in the Overview
Video.Simple Query.
This tool uses your operating system's built-in resolver
to do a basic DNS query. It accepts an IPv4 address or hostname
and queries your default name servers for the translation.
Your operating system may also attempt to determine the
NetBIOS computer name if the default DNS fails to respond
to an IP address query. Both IPv4 and IPv6 are
supported, but you need an IPv6 capable operating system
like Windows 7 or Vista to do IPv6 queries. [Start Query] Tool Capabilities - Who Am I and Test Default Servers
Watch a demonstration video of "Who Am I" in the Overview
Video.Who Am I?
This button asks queries your system for it's Windows computer
name. Then it uses that name to obtain the IP addresses
and any aliases assigned to your computer. It shows the
list of default DNS name servers used by your computer.
Test Default Servers. This tool
takes an IP address or hostname and requests the A or PTR
record from each DNS name server assigned to your computer.
This tells you if each default DNS is working or communicating
properly when a simple name resolution query is made by
any internet enabled program. NSLOOKUP (Name Server Lookup)
Watch a demonstration video (flash) of NSLOOKUP used to
get resource records for a domain.
Watch a demonstration video (flash) of DiG +trace and NSLOOKUP
used to get resource records for an IP address.
NSLOOKUP. This
tool functions like the UNIX or Windows command line nslookup
program. It uses the parameters specified in Setup to define
which records are requested from DNS. Unlike Simple Query,
you can specify exactly which DNS server to use with your
NSLOOKUP, AXFR, or DIG queries -- the DNS can be anywhere
reachable through the network. We support 47 record types
including the popular A, ANY, CNAME, MX, NS, PTR, SOA, and
TXT types. A typical 'ANY' query result is shown below: DiG (Domain Information Groper)
Watch a demonstration video (flash) of DiG and DiG +trace.
DiG (Domain Information Groper)
is similar in functionality to NSLOOKUP, however, it provides
much more detailed information. Our current output format
is based on Dig version 9.x.
DiG +trace
provides a traceback to the root servers of all delegated
zone responsible name servers down to the authoritative
host for the domain or IP address you entered. This example
shows a query of nwpsw.com. Zone Transfer (Automatic or Manual)This tool can show all the devices registered in a DNS zone that defines a domain using a 'zone transfer' request. We provide two types of Zone Transfer: one attempts to automatically locate the Authoritative host to make the transfer possible and the other allows you to specify the Authoritative DNS for the Zone. DNS servers that implement tight security will not allow you to do a zone transfer unless you are on an approved IP address list. Transfer method is TCP using AXFR DNS protocol. Get Basic DNS RecordsThis tool retrieves a set of DNS records from the Current DNS Server all at once. The records we request are A, AAAA, NS, MX, CNAME, PTR, and TXT. [Start
Query] Hosts File Editor and Flush Default DNS CacheTwo additional parts of DNS Tools - Core are the Hosts File Editor and Flush Default DNS Cache.The Hosts file is used by Windows (and other operating systems) as a local database for resolving hostnames to IP addresses and vice versa. If something is in the hosts file, TCP/IP uses the information found in the hosts file instead of querying DNS. The hosts file is a simple text file and we have provided an editor to help you manage it. Flush Default DNS Cache does what it
says - it clears your local cache of IP addresses and
hostnames that were recently resolved. It accomplishes
exactly the same thing as doing ipconfig /flushdns from
the command line. This only affects names and IPs
resolved by your TCP/IP networking subsystem, it does
not affect anything resolved using our nslookup or dig
tools. |
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