Reverse DNS lookup Help

Hi All,

In my java application i use the "InetAddress" class for resolving the IPAddresses into Hostnames. Below is my implementation method,

public String getHostNameFromIP(String ipaddr)

{

String dnsName = ipaddr;

try

{

InetAddress addr = InetAddress.getByName(ipaddr);

dnsName = addr.getCanonicalHostName().trim();

System.out.println("CanonicalName............:" + dnsName);

//dnsName = addr.getHostName().trim();

//System.out.println("HostName..................:" + dnsName);

}catch(Exception e)

{

e.printStackTrace();

}

return dnsName;

}

Below are my queries,

1. Can i get the hostname from IPAddresses[My input is only IPAddress] using otherthan 'InetAddress' class from JAVA.

2. Above method doesn't give me the proper results for my list of IPAddresses [Internal and External IP's] but the 'nslookup' will resolve all IPAddresses. Why 'InetAddress' class not give me the proper results?

Please note that i tried with DNS and HostName configuration for DHCP setup as well as in static IP setup [Windows XP]

Please pour your views.

Thanks,

Saravanan.H

[1218 byte] By [saran@suna] at [2007-11-27 7:59:28]