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Top Forums UNIX for Advanced & Expert Users Interpretation of Ping behaviour Post 302922176 by ghostdog74 on Thursday 23rd of October 2014 05:14:47 AM
Old 10-23-2014
thanks all. the problem is solved. turns out its doing a reverse DNS lookup using the nameserver in resolv.conf. have to add an entry on local hosts file to prevent it using the nameserver.
 

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RESOLV.CONF(5)							File Formats Manual						    RESOLV.CONF(5)

NAME
resolv.conf - Domain Name System resolver configuration SYNOPSIS
/etc/resolv.conf DESCRIPTION
The /etc/resolv.conf is used to configure how the host will use the Domain Name System to resolve hostnames to IP addresses. It may con- tain these two lines: nameserver IP-address domain domain-name The nameserver entry tells the IP address of the host to use for DNS queries. If it is set to 127.0.0.1 (which is the default) then the local name daemon is used that may use the /etc/hosts database to translate host names. You normally only need a nameserver entry if the name server is at the other side of a router. The default nonamed name server can't look beyond the local network. The domain entry tells the default domain to use for unqualified hostnames. This entry is usually not given in which case the domain of the local host is used. The long version of this story can be found in resolver(5). FILES
/etc/resolv.conf DNS resolver configuration file. SEE ALSO
resolver(5), hosts(5), nonamed(8), boot(8). AUTHOR
Kees J. Bot (kjb@cs.vu.nl) RESOLV.CONF(5)
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