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Operating Systems Solaris ping java.sun.com......
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Old 08-01-2011
Basic DNS client machine setup is always something like the UNIX /etc/resolv.conf to tell a host it's name servers (2 usually), plus possibly host name and domain and more: Man Page for RESOLV.CONF (All Section 5) - The UNIX and Linux Forums

This may be set by DHCP for dynamic clients. DNS clients send queries to one of their DNS servers, asking for recursion so the answer they get is either none-such or one or more answers, for the code calls gethostbyname() and reverse address getostbyaddr() (for validation of its clients -- a host may be a DNS client but an email server, for instance, and email SMTP servers do reverse lookup on each connection to 25, the value you see in mail headers in parens).

The configuration of DNS Servers and the structuring of domains to be served is a bigger topic. Most likely, your DNS servers are OK, or others would be complaining.
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LEARN ABOUT SUNOS

jms-ping

asadmin-jms-ping(1AS)						   User Commands					     asadmin-jms-ping(1AS)

NAME

       jms-ping  - checks to see if the JMS provider is up and running

SYNOPSIS

       jms-ping   --user  admin_user  [--password  admin_password]  [--host  localhost]  [--port  4848]  [--passwordfile  filename]  [--secure|-s]
       [--terse=false] [--echo=false] [--interactive=false]

       Checks to see if the JMS provider is up and running. This command is supported in remote mode only.

OPTIONS

       --user		       authorized domain application server administrative username.

       --password	       password to administer the domain application server.

       --host		       machine name where the domain application server is running.

       --port		       port number of the domain application server listening for administration requests.

       --passwordfile	       file containing the domain application server password.

       --secure 	       if true, uses SSL/TLS to communicate with the domain application server.

       --terse		       indicates that any output data must be very concise, typically avoiding human-friendly sentences and favoring well-
			       formatted data for consumption by a script. Default is false.

       --echo		       setting to true will echo the command line statement on the standard output. Default is false.

       --interactive	       if set to true (default), only the required password options are prompted.

       Example 1: Using jms-ping

       asadmin> jms-ping --user admin --password adminadmin --host bluestar --port 4848 server1
       JMS Ping Status=RUNNING

EXIT STATUS

       0		       command executed successfully

       1		       error in executing the command

       asadmin-create-jmsdest(1AS), asadmin-delete-jmsdest(1AS), asadmin-list-jmsdest(1AS)

J2EE 1.4 SDK							    March 2004						     asadmin-jms-ping(1AS)