DNS – Any way to force a nameserver to update the record of a domain

binddomain-name-systemupdate

I am doing some work on some domain names. I'm updating them. By using dig I can query our nameserver and I can see that the correct name has been updated. However our office dns cache is still showing the old name. Yesterday I set the TTL down to 10 minutes, so I don't have to wait long. However is there any way to trick the office's dns cache to update? Any sneaky little trick I can do to make things easier?

UPDATE Let's assume I don't have access to the server, and can't restart it? Is there anything else I can do?

Best Answer

Assuming your DNS server is on a PC and not a router etc:

Linux cache flush:

/etc/init.d/nscd restart

Or for distros without nscd

/etc/init.d/named restart

Windows client cache flush for individual machines:

ipconfig /flushdns

Windows server cache flush for office server (thanks to ericmayo for the correction):

  1. Navigate to Administrator Tools
  2. expand the server object
  3. right click cached objects
  4. select clear cache

Mac (possibly?!):

dscacheutil -flushcache

If you have a web GUI etc for a router, there will be an option in there somewhere.

Cross platform cache flushing as above

About DNS and caching

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