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Top Forums Shell Programming and Scripting How to get reason for ping failure using perls Net::Ping->new("icmp");? Post 302821059 by tavanagh on Friday 14th of June 2013 02:45:48 AM
Old 06-14-2013
I have tried same script using system ping for list of hosts I want to ping - for some of the hosts I am getting unknown hosts for others I am getting Host unreacheable. Do I need to do something like nslookup to check if host is in dns on the failed nodes - I was hoping I could do all with ping.
 

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desproxy-dns(1) 						   User Commands						   desproxy-dns(1)

NAME
desproxy-dns - DNS for dynamic connections SYNOPSIS
desproxy-dns dns_server proxy_host proxy_port OPTIONS
None DESCRIPTION
If you have direct DNS access then you don't need to do anything else. You know you have direct DNS access if you can resolve host names to IP addresses. NOTE: as desproxy-dns listens in port 53 (which is less than 1024) you may need administrator privileges to exec desproxy-dns (in fact if you are running UN*X, you actually have to run desproxy-dns as root). OK, so you have a dns server accessible now. But your computer doesn't know anything about that. You must configure your network accordingly (again, need to be root in UN*X). Edit /etc/resolv.conf and add the line "nameserver 127.0.0.1". You don't have to restart anything. Just test ping and see if it works. ENVIRONMENT
None. FILES
None. SEE ALSO
dnsproxy(1), ping(1) AUTHORS
This manual page was written by Jari Aalto <jari.aalto@cante.net>, for the Debian GNU system (but may be used by others). Released under license GPL v2 or any later version. desproxy-dns 2012-03-26 desproxy-dns(1)
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