Downloading DNSCheck 1.0 from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the free program is Hollsco Group.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. DNSCheck.exe is the common file name to indicate this program's installer. The following version: 1.0 is the most frequently downloaded one by the program users. DNSCheck lies within Internet & Network Tools, more precisely Network Tools.
From the developer:
DNSCheck was written to combat a bug in the Windows build of BIND 9. Under load, it appears that BIND 9 simply stops answering queries on either or both TCP and/or UDP ports, although the service continues to run, so service recovery does not solve the problem.
Hollsco Group tried using other DNS monitoring applications, however most of them monitored the UDP port only.
You may want to check out more software, such as PageScope Network Setup, Veeam FastSCP or CrossFTP Server, which might be similar to DNSCheck.