Summary
After installing Deep Security Windows Agent with Trend Micro Lightweight Filter Driver, you are unable to ping the target computer via FQDN name.
Details
Windows client will send, delete, and add DNS A record to the DNS server during a network configuration. The DNS A record may disappear, especially on Windows Domain environment with multiple AD integrated DNS servers. The issue occurs after the DNS A record synchronized on multiple DNS servers.
To resolve the issue, perform either of the following options:
Option A
- Open a command prompt with administrator privilege.
- Execute the command below:
ipconfig /registerdns
Option B
- Open a command prompt with administrator privilege.
- Download the FQDNtest.bat batch script.
- Modify the file to reflect the DNS server IP address of your environment.
- Execute the FQDNtest.bat file.
The batch file will check DNS A record for a total of 15 times, and then it will stop.
