Not sure if you can flush the ER cache, restarting the process will work:
sudo service dnsmasq restart
On your client, you might need to flush its DNS table too, on windows:
ipconfig /flushdns
Not sure if you can flush the ER cache, restarting the process will work:
sudo service dnsmasq restart
On your client, you might need to flush its DNS table too, on windows:
ipconfig /flushdns