Skip to main content

Error During Agent Operation on Server: No Such Host is Known

Symptom​

Activity Summary contains the following error message:

<ServerName>: Error during agent operation on server <ServerName>. No such host is known. Additional information: none.

Causes​

Here are the possible causes for the issue:

  • Cause 1. Incorrect server names are specified.
  • Cause 2. DNS-request fails.

Resolutions​

Here are possible options to resolve the issue:

Check Server Names​

First of all, check that all server names are specified correctly in the program settings. Make sure that your DNS server, has the DNS-records registered for your problematic servers:

  1. On the server running Netwrix Auditor Server host, launch the nslookup tool: click Start / Run, type in nslookup.exe and press Enter.
  2. In the nslookup dialog, check all your problematic servers one by one: specify a server name and press Enter.
  3. If the IP-addresses appear in the command output, your DNS server has the DNS-records registered correctly.

Check DNS Records​

If the DNS-records are not registered correctly, perform the steps below:

  1. On each problematic server, launch the command prompt: click Start / Run, type in cmd and press Enter.
  2. Type in the ipconfig /registerdns command and press Enter.
  3. As a result, the DNS records will be registered for your servers.