About DNS Cache

DNS Cache COMMANDS IN WINDOWS

Refresh DNS Cache:

C:/> ipconfig/flushdns
Windows IP configuration
Successfully flushed the DNS resolver cache.

 

View DNS Cache:

C:/> ipconfig/displaydns

Disable DNS Cache:

C:/> net stop Dnscache
C:/> SC servername stop Dnscache

You can also close the DNS Client in Control Panel> service.

Change DNS Cache Time:

Modify the Registry HKEY_LOCAL_MACHINE/system/CurrentControlSet/services/Dnscache/parameters

Maxcachettl Max DNS Cache Time
Maxnegativecachettl Max failed DNS Cache Time

DNS Cache commands in Linux

Restart or stop nscd (name server cache Daemon:

$ Service nscd restart
$/Etc/rc. d/init. d/nscd restart
$ Service nscd stop
$/Etc/rc. d/init. d/nscd stop

You can also disable nscd in the service.

Refer:

How do I flush DNS?

Summary of some tips on DNS Cache