dns 0.01
Public Domain
Jonah Burke, jonah@jonahb.com
dns is an interactive program that lets you query the Domain Name System.
I wrote it to learn about the DNS.
BUILDING
--------
$ ant
USAGE
-----
$ java -jar dns nameserver-ip-address nameserver-port
Example:
$ java -jar dns 8.8.8.8 53
COMMANDS
--------
resolve (r) - resolves a host name to an IP address
Usage: resolve domain
Example: resolve jonahb.com
If no command is entered (i.e., just a domain name), the resolve command is
executed by default. Thus you may resolve jonahb.com with the command
"r jonahb.com" or just "jonahb.com".
query (q) - performs a general lookup
Usage: query [options] domain [query-type [query-class]]
Options: -nr non-recursive query
Example: query -nr jonahb.com cname
query-type may be a resource record type (e.g. A, CNAME, MX) or "*" or
"All". query-class may be "Internet", "Hesiod", "CHAOS", "*", or "Any".
If either of query-type or query-class is not specified, the setting is used
(see documentation for set command).
reverse (v) - performs a reverse lookup, finding the domain for an IP address
Usage: reverse ip-address
Example: reverse 66.33.211.117
trace (t) - simulates an iterative resolution of a host name to an IP address
by (1) finding the host's canonical name, if any; (2) printing the name
server for each domain in the hierarchy; (3) printing the ip address of the
host.
Usage: trace domain
Example: trace jonahb.com
set (s) - changes settings
Usage: set [querytype | qt] query-type
set [queryclass | qc] query-class
set [nameserver | ns] ip-address [port]
The querytype and queryclass settings only apply to the query (q) command.
The nameserver setting applies to all commands. If the port is not
specified, the default DNS port (53) is used.
quit (exit) - quits the program
Usage: quit