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Full Discussion: DNS testing
Special Forums IP Networking DNS testing Post 302310158 by vadi01 on Thursday 23rd of April 2009 11:59:30 PM
Old 04-24-2009
use dig

Assuming you have a caching nameserver, as said above use dig
Test your nameserver using host or dig and querying redhat.com
Quote:
dig redhat.com
.
.
;; Query time: 42 msec
;; SERVER: 127.0.0.1#53(127.0.0.1
)

From the above dig query you can see it took 42 msec to receive the DNS request. Now test out the caching ability of your nameserver by running dig again on the redhat.com domain.

We dropped from 42 msec to 1 msec after the previous DNS query was cached. Caching is working!
 

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avahi-dnsconfd(8)					      System Manager's Manual						 avahi-dnsconfd(8)

NAME
avahi-dnsconfd - Unicast DNS server from mDNS/DNS-SD configuration daemon SYNOPSIS
avahi-dnsconfd [options] avahi-dnsconfd --kill avahi-dnsconfd --refresh avahi-dnsconfd --check DESCRIPTION
avahi-dnsconfd connects to a running avahi-daemon and runs the script /etc/avahi/dnsconfd.action for each unicast DNS server that is announced on the local LAN. This is useful for configuring unicast DNS servers in a DHCP-like fashion with mDNS. OPTIONS
-D | --daemonize Daemonize after startup and redirect log messages to syslog. -k | --kill Kill an already running avahi-dnsconfd. (equivalent to sending a SIGTERM) -r | --refresh Tell an already running avahi-dnsconfd to refresh the DNS server data. (equivalent to sending a SIGHUP) -c | --check Return 0 as return code when avahi-dnsconfd is already running. -h | --help Show help -v | --version Show version information FILES
/etc/avahi/avahi-dnsconfd.action: the script to run when a DNS server is found or removed. SIGNALS
SIGINT, SIGTERM, SIGQUIT: avahi-dnsconfd will shutdown. This is issued by passing --kill to avahi-daemon. SIGHUP: avahi-dnsconfd will refresh the DNS server data. AUTHORS
The Avahi Developers <avahi (at) lists (dot) freedesktop (dot) org>; Avahi is available from http://avahi.org/ SEE ALSO
avahi-daemon(8), avahi-dnsconfd.action(8) COMMENTS
This man page was written using xml2man(1) by Oliver Kurth. Manuals User avahi-dnsconfd(8)
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