Need a DNS monitor, preferably Windows-based

Brad Knowles brad.knowles at skynet.be
Fri Mar 16 08:58:46 UTC 2001


At 1:37 AM +0000 3/16/01, Ray wrote:

>  Is anyone aware of a program that will periodically automatically query a
>  DNS server (BIND, in this case) and set off some kind of alert (email,
>  pager) if a valid response is not returned?

	I believe that this feature is a standard part of the "mon" 
system/network monitoring package.  According to FreshMeat, the home 
page for this package is at 
<http://freshmeat.net/redir/mon/6607/url_homepage/>.

>  I'm not talking about a pinger; rather something that will actually perform
>  a lookup and then complain if the server does not respond. We've got several
>  Linux BIND servers scattered around and need a better way of noticing
>  outages than having users call our Help Desk.

	There are a number of monitor scripts included as part of the 
base package, see <http://www.kernel.org/software/mon/monitors.html>. 
One of these is "DNS".  If the scripts provided do not meet your 
needs, you can always modify them and then contribute the changed 
version back.

--
Brad Knowles, <brad.knowles at skynet.be>

#!/usr/bin/perl -w
# 531-byte qrpff-fast, Keith Winstein and Marc Horowitz <sipb-iap-dvd at mit.edu>
# MPEG 2 PS VOB file on stdin -> descrambled output on stdout
# arguments: title key bytes in least to most-significant order
# Usage:
# qrpff 153 2 8 105 225 /mnt/dvd/VOB_FILE_NAME | extract_mpeg2 | mpeg2_dec -
$_='while(read+STDIN,$_,2048){$a=29;$b=73;$c=142;$t=255;@t=map{$_%16or$t^=$c^=(
$m=(11,10,116,100,11,122,20,100)[$_/16%8])&110;$t^=(72, at z=(64,72,$a^=12*($_%16
-2?0:$m&17)),$b^=$_%64?12:0, at z)[$_%8]}(16..271);if((@a=unx"C*",$_)[20]&48){$h
=5;$_=unxb24,join"", at b=map{xB8,unxb8,chr($_^$a[--$h+84])}@ARGV;s/...$/1$&/;$
d=unxV,xb25,$_;$e=256|(ord$b[4])<<9|ord$b[3];$d=$d>>8^($f=$t&($d>>12^$d>>4^
$d^$d/8))<<17,$e=$e>>8^($t&($g=($q=$e>>14&7^$e)^$q*8^$q<<6))<<9,$_=$t[$_]^
(($h>>=8)+=$f+(~$g&$t))for at a[128..$#a]}print+x"C*", at a}';s/x/pack+/g;eval


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