what caused an ISP to display "unknown host"
We found an ISP unable to route one of our server's dns which keeps dispalying "unknown host" but once they flush the DNS, it works again....It will display "unknown host" again after few days less than a week.
The DNS of the server is running normal which other ISP able to route it..mostly nearly all of the one I know.
Could anyone help in the issue of "unknown host"?
Regards
