Force Windows DNS to Flush Cache

[scottalanmiller]

I'm on a train and it is hard to look this up. Anyone know how to make a Windows DNS server (yes, it's on a DC) to flush its cache and donfresh lookups?

[jt1001001]

@scottalanmiller ipconfig /flushdns should do it I think

[scottalanmiller]

@jt1001001 said in Force Windows DNS to Flush Cache:

@scottalanmiller ipconfig /flushdns should do it I think

Even for the server and what it hands out?

[scottalanmiller]

Even for the server and what it hands out?

[dafyre]

Open the DNS Manager, right click on server name, and then Clear Cache?

[dafyre]

Or from the command prompt, try

dnscmd /clearcache

[dafyre]

@jt1001001 said in Force Windows DNS to Flush Cache:

@scottalanmiller ipconfig /flushdns should do it I think

This only clears the cache for client machines, AFAIK.

[jt1001001]

Windows Server in powershell is Clear-DnsServerCache

[jt1001001]

@dafyre My apologies, you are correct ipconfig /flushdns is client cache only.

[scottalanmiller]

We probably need to do both. But we knew the one

[dafyre]

@jt1001001 said in Force Windows DNS to Flush Cache:

Windows Server in powershell is Clear-DnsServerCache

I couldn't find that one with a google search... My GoogleFu is weak today.

[Obsolesce]

@dafyre said in Force Windows DNS to Flush Cache:

Or from the command prompt, try

dnscmd /clearcache

This is the one to use first on dns servers. Then the regular one for clients afterwards.

[bbigford]

If you're going to use Clear Cache in the DNS snap-in GUI, you need to enable Advanced Features in the View drop down, to see that option.

[dbeato]

Use the clear-dnsservecache cmdlet

https://technet.microsoft.com/en-us/itpro/powershell/windows/dns-server/clear-dnsservercache