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DNS lookup is a tool
to convert IP addresses to hostnames and vice versa and to obtain aliases. DNS
lookup performs advanced DNS queries, such as MX or CNAME. The full list of
queries supported by this tool contains A, NS, MD, MF, CNAME, SOA, MB, MG, MR,
NULL, WKS, PTR, HINFO, MINFO,MX,TXT,AXFR,MAILB,MAILA,*.
To perform a
standard query, select Standard Mode from the Question Type
list, enter an IP address or hostname in the Dns Servers field, and
click Resolve. The program will display the query result in a few
seconds.
To perform
non-standard queries, select the type of record you are requesting from the Question
Type list, enter your query in the Dns Query field, and enter a DNS
server address in the Dns servers field, and click Resolve. The program
will display the query results in few seconds in Dns Response section.
Using Dns tools makes
possible to check if the host is a Real-time Black list for spammers “RBL “.
To use this feature
select the appropriate IP address in “Connection Monitoring” view and select
from right click pop-up menu the item “RBL Check…”.
To create your own
request use the algorithm described bellow:
To check if 127.0.0.2 IP
address is in SORBS Real-time Black list , select “Host Address (A)” from
Question type combo box type in “Dns Query” box the IP address in reverse order.For
“127.0.0.2” you will get “.dnsbl.sorbs.net”.
The result will be
“2.0.0.127.dnsbl.sorbs.net” .
This tool requests
following DNS records for a host or domain
A a host address
NS an authoritative
name server
MD a mail destination
(Obsolete - use MX)
MF a mail forwarder
(Obsolete - use MX)
CNAME the
canonical name for an alias
SOA marks the start of a
zone of authority
MB a mailbox domain
name (EXPERIMENTAL)
MG a mail group member
(EXPERIMENTAL)
MR a mail rename
domain name (EXPERIMENTAL)
NULL a null RR
(EXPERIMENTAL)
WKS a well known service
description
PTR a domain name
pointer
HINFO host
information
MINFO mailbox or
mail list information
MX mail exchange
TXT text strings
AXFR A request for a
transfer of an entire zone
MAILB A request
for mailbox-related records (MB, MG or MR)
MAILA A request
for mail agent RRs (Obsolete - see MX)
ALL A request for all
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