Java by default caches successful DNS lookup forever. Turning changing this will have performance impact befauce of DNS lookups and there are security concerns. If you are using load balancing that relies on DNS this will need to be changed.…
Best Practices – DNS resolution
Should test forward and backup resolution to all dns servers for hosts. To insure zone files are updated everywhere.
Best Practices – critical hosts should be in local host file
Any hosts that are critical should be found in the local host file or referred to by IP address in the application configuration.