ITCAM4Tx ISM DNS monitor reports 'no such domain (no recursion)' error
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When using the ITCAM for Transactions ISM DNS monitor, you can get failures when setting it to resolve popular websites. These failures have the message
"No such domain (no recursion)"
You have set up the ISM DNS monitor to try and resolve the IP address of a popular web site but it keeps returning an error "No such domain (no recursion)" even
These failures often occur because modern websites use DNS records in a much more layered and complex manner. Often involving multiple layers of aliases and
The first thing to try is setting the query type in the affected element.
Open the element in the ISM Config GUI in the TEP and set the query type field to "A" like in the picture below.
It is found in $ISMHOME/etc/props and you can set it as follows:
This means that any element with an empty query type field sends a DNS query of type A rather than type ANY.
Another issue is that some DNS entries have multiple levels of aliases. This is where it returns a CNAME record and resolving that CNAME returns another CNAME.
We can configure the monitor to be satisfied with CNAME records by setting the AcceptCNAME property in the dns.props file. Just add:
$ISMHOME is the installation directory under the ITM install.
On Unix it is usually
on Windows it is usually
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