Error: Failed to configure DNS / DNS domain name resolution failed (Unable to set preferred / alternate DNS server)
Last Modified: 2022-11-21 15:46:57 Etc/GMT
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Error: Failed to configure DNS / DNS domain name resolution failed (Unable to set preferred / alternate DNS server)
Technical Articles ID:
KB94864
Last Modified: 2022-11-21 15:46:57 Etc/GMT Environment
Advanced Threat Defense (ATD) Trellix Intelligent Sandbox (TIS) Problem
You aren't able to set the preferred or alternate DNS server for ATD or TIS from either the Manager or command-line interface. The ATD or TIS Manager GUI shows the error below: The CLI shows the error below:
Cause
ATD or TIS verifies the DNS server availability by performing a reverse lookup of the IP address of the DNS server. If the DNS server can't resolve the reverse lookup of its IP address, ATD or TIS treats the DNS server as unavailable, and shows an error.
Solution
Configure your DNS server so that it resolves the reverse lookup of its IP address. Example: NOTE: This example assumes that the DNS server used as the preferred DNS server in the ATD or TIS configuration is 192.168.100.10/24:
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