Tried and failed with the www.cisco.com example posted on the forum? Or with
an adaptation specific to your circumstance?
Capturing the query/response in a utility like Ethereal should reveal what
it is that the server does not like.
(For what it's worth, the djb server is especially picky about what it
expects to see in a query.)
This is an adaption of the basic idea:
Network Type: UDP
Port: 53
Timeout: 5
Script:
Send=\x15\x80\x01\x00\x00\x01\x00\x00\x00\x00\x00\x00\x03com\x00\x00\x06\x00
\x01
Expect=\x15\x80\x81\x80
As in the cisco example, the first two bytes in the query is the transaction
ID. The script parses the query response for this same transaction ID and
the bytes that mean "Standard query response, no error".
Note: Whilst this example is given using WhatsUp Professional Script
syntax, WhatsUp Gold can be configured to perform the same function simply
by using "%nnn" syntax instead of "\xnn".
Returning to the original problem, if you can give a few more details about
what you mean by requiring an either/or response then I am certain that an
appropriate Send/Expect query can be constructed. It's valid to say "it's a
bit harsh to have to build one from scratch in hex" but the flip side is
that:
a) Once it's done it's done
b) Results can be shared here on the forums and via Knowledgebase articles.
There is a Feature Request logged for implementing improvements to the DNS
monitor. The challenge is to answer the question "exactly what problems are
we trying to solve?". That's where Use Case examples from users such as
yourself are so useful.
If we seek to query whether the DNS server is active and answering simple
queries sensibly then we already have the solution. Something that can be
run on a standard WhatsUp poll cycle and which is appropriate for such a
cycle (once a minute, once every five minutes, etc).
If we are seeking to check that the server is correctly configured then
perhaps we are looking at the sort of thing that would be more appropriate
to run (say) once every 24 hours. Once upon a time I was responsible for
maintaining some 200 domains (back in the day when it was *hard* to
regsister a new domain) and I ran a cron job every night that used dnswalk,
etc, and then emailed an exception report when anything was out of kilter.
The point being.. I would run for months at a time without every getting
such a report. The standard DNS check in WhatsUp Gold was thus fit for
purpose. Was the scheduled task something that WhatsUp should do itself?
After all, it was checking literally thousands of things.. lame
delegation, matching A and PTR records, etc.
Mark Symons
Ipswitch, Inc
Augusta GA
PS: WhatsUp Pro 2005 Recurring Reports not supporting Program Actions (etc)
is a logged issue.
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of
[EMAIL PROTECTED]
Sent: Wednesday, April 06, 2005 8:34 AM
To: [email protected]
Subject: RE: [WhatsUp Forum] Custom DNS Query
Thanks for this.
I have tried and failed with this method. If I can make enough time I will
work out the syntax and try again.
We return multiple DNS responses based on proximity, so I need to create an
either/or type reply. This functionality comes out of the box in plain text
with some comparable and lesser products we trialled. Seems strange its not
included in WUP. Is there a "feature request" service at Ipswitch that
anybody knows about?
The feature is already there to create a new DNS monitor, you just cant do
anything with it. It seems a bit harsh to have to build one from scratch in
hex. It kinda defeats the object of proactive monitoring if your'e going to
be spending hours configuring everytime you change something. It seems a lot
easier to build custom HTTP scripts for example, not so with DNS.
Thanks anyway
From: Lloyd Wheeler [mailto:[EMAIL PROTECTED]
Sent: 05 April 05 14:02
To: [email protected]
Subject: RE: [WhatsUp Forum] Custom DNS Query
Check out the following from the WUP forum:
http://www.ipswitch.com/forums/shwmessage.aspx?ForumID=14&MessageID=6200
Lloyd Wheeler
Helmerich & Payne, Inc.
[EMAIL PROTECTED]
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Tuesday, April 05, 2005 5:25 AM
To: [email protected]
Subject: [WhatsUp Forum] Custom DNS Query
Is there any way to create a custom DNS query for a FQDN instead of the
standard localhost reverse lookup.
Reason I ask is that we monitoring a multi-homed site with appliances that
don't employ full dns, but rather respond to particular A records in a way
that relates to link performance, availability etc.
We have occasion when the DNS service is obviously up at these appliances,
but certain FQDN are unresponsive and renders the websites unavailable. I
know this features in other products but we really want to centralise
everything through a WUP front-end.
Thanks in advance
Heath Dickinson MBCS CCNA MCP
IT Communications Administrator
Goldmedal Travel Group plc
Tel: 01772 835106
[EMAIL PROTECTED]
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