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Warning:
NEVER scan a computer you
do not own or have the owner's permission
to scan. |
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Name Server Lookup Tool Description
The Name Server Lookup tool is a collection of powerful
tools for querying DNS servers. Use the tools to troubleshoot DNS
settings or determine other name resolution problems.
- Simple Query.
This uses the operating system's networking resolver to do a
DNS query. It takes an IPv4 address or hostname and queries
your default name server(s) for the translation. It also attempts
to determine NetBIOS computer names if your DNS fails to respond
to an IP address query--provided your computer and the target
computer are both set up to do NetBIOS over TCP/IP.

- Who Am I? This
button asks queries your networking subsystem for your computer
name. Then it uses that name to obtain the IP addresses and
any aliases assigned to your computer. It also shows a list
of default name servers.

- Test Default Servers. This tool
takes an IP address or hostname and tests the A or PTR
record resolution for each name server IP address assigned
to your computer. This assignment either occurs via DHCP or
is statically assigned. Either way it tells you if each DNS
is working or communicating properly when a standard name
resolution query is made by any internet enabled program.

- NSLOOKUP. This
feature functions like the UNIX 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. We support 43 record types including the popular
A, ANY, CNAME, MX, NS, PTR, SOA, and TXT types. A typical 'ANY'
query result is shown below:

- List Domain.
List Domain is actually a Zone Transfer or AXFR utility. The
purpose of this utility is to make a TCP connection to DNS and
request a zone (list of records) for a domain. List Domain attempts
to automatically locate the Authoritative host to make the transfer
possible. Security DNS server will not allow you to list the
hosts via zone transfer unless you are on an approved IP address
list.

- Dig or Domain Information Groper
is similar in functionality to NSLOOKUP, however, it provides
much more detailed information. We have provided DIG and DIG
with a zone transfer. Due to security concerns most domains
will not allow you to list the hosts via zone transfer unless
you are on an approved IP address list.

- DNS Verify takes
an IP address and does a reverse lookup on it to find the hostname.
Then it takes the hostname and translates it back to an IP address.
If the IP addresses match, the DNS records verified. There is
a batch version of this tool included as part of the
HyperTrans tool.

- IP Drilldown is a tool for determining
all the responsible name servers (and also the company names)
of an IPv4 address. It uses the selected DNS to query in ARPA
namespace for each class D, C, B and A.

- ENUM. This feature in Name Server
Lookup accepts a fully qualified telephone number beginning
with the country code and returns any records maintained by
the end user in the ENUM registry in the public domain e164.arpa
(or any other root you choose).
Example
(parts of this query
have been altered to protect the privacy of the phone number
owner. The phone number is fictitious.)
[Start Queries] Processing Telephone Number [+420596987654]
[Query in ENUM NAPTR namespace for 4.5.6.7.8.9.6.9.5.0.2.4.e164.arpa]
Server: unknown_server_name Address: 208.200.248.1
Non-authoritative answer: 4.5.6.7.8.9.6.9.5.0.2.4.e164.arpa
NAPTR order = 200,
preference = 50
flags
= "u"
services
= "E2U+h323"
rule
= "!^\+(.*)$!h323:\1@xyzext.samplecompany.cz!"
replacement = (root)
4.5.6.7.8.9.6.9.5.0.2.4.e164.arpa
NAPTR order = 100,
preference = 50
flags
= "u"
services
= "E2U+sip"
rule
= "!^\+(.*)$!sip:\samplecompany.cz!"
replacement = (root)
Authoritative answers can be found from: 8.9.6.9.5.0.2.4.e164.arpa
NS nameserver
= ns.samplecompany.cz 8.9.6.9.5.0.2.4.e164.arpa
NS nameserver
= ns.samplecompany.net ns.samplecompany.net
A
internet (IPv4) address = 255.254.253.233
[End Query]
- Setup. This
is used to define the many types of NSLOOKUP or DIG record queries
you will be making. It also controls filtering on Zone Transfers
(List Domain). Specify the name server you will be using here.
Windows Vista compatibility: Fully functional
as of v10.42.
Screenshot of the Tool


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