Re: Refreshing cache in other DNS Servers

2013-10-16 Thread Manson, John
I would add that Windows PC OSs by default have the dns client cache set to 'enable'. John Manson U.S. House of Representatives | HIR Data Communications | Washington, DC 20515 Desk: 202-226-4244 | NCC: 202-226-6430 | john.man...@mail.house.gov ___

Re: Refreshing cache in other DNS Servers

2013-10-16 Thread Dave Warren
On 2013-10-16 09:47, Manson, John wrote: I would add that Windows PC OSs by default have the dns client cache set to 'enable'. Yes. And like Windows Server's DNS cache, these honour TTLs too, so as long as TTLs are set properly, it's not an issue. -- Dave Warren http://www.hireahit.com/

Refreshing cache in other DNS servers

2013-10-15 Thread babu dheen
Hi,    I am running BIND caching DNS server in Redhat Linux. This DNS server is used as name server for other DNS servers which are running in Windows 2003. Whenever I modify a existing record in BIND DNS caching server zone, its not immediately taking affect in my Windows DNS servers. But if I

Re: Refreshing cache in other DNS servers

2013-10-15 Thread Matus UHLAR - fantomas
On 15.10.13 19:38, babu dheen wrote:  I am running BIND caching DNS server in Redhat Linux. This DNS server is used as name server for other DNS servers which are running in Windows 2003. Whenever I modify a existing record in BIND DNS caching server zone, its not immediately taking affect in

Re: Refreshing cache in other DNS servers

2013-10-15 Thread babu dheen
Hi Matus,  The standard way to handle this situation is, when you know you are going to make a change, to lower TTL of a particular RR to a small value (e.g.  300) and after change to restore the TTL to sane standard value (e.g.  43200).   I just need clarification on your above update.    If I

Re: Refreshing cache in other DNS servers

2013-10-15 Thread /dev/rob0
On Tue, Oct 15, 2013 at 10:53:13PM +0800, babu dheen wrote: Hi Matus, The standard way to handle this situation is, when you know you are going to make a change, to lower TTL of a particular RR to a small value (e.g.  300) and after change to restore the TTL to sane standard value (e.g. 

Re: Refreshing cache in other DNS servers

2013-10-15 Thread Steven Carr
On 15 October 2013 15:53, babu dheen babudh...@yahoo.co.in wrote: If I change the TTL value on the particular zone after modifying a record in Redhat Linux BIND Caching DNS server, My Redhat bind Caching DNS server cache would be refreshed after 300 seconds but what if my backend windows DNS

Re: Refreshing cache in other DNS servers

2013-10-15 Thread Matus UHLAR - fantomas
On 15.10.13 22:53, babu dheen wrote: To: Matus UHLAR - fantomas uh...@fantomas.sk, bind-users@lists.isc.org bind-users@lists.isc.org Hi Matus, you don't need to send me private copies - we are using a mailing list for a purpose... thank you.  If I change the TTL value on the particular zone

Re: Refreshing cache in other DNS servers

2013-10-15 Thread Kevin Darcy
There's no way within the DNS protocol itself to reach out and tell a nameserver to purge an entry in its cache that hasn't expired yet. There are out of band ways: e.g. restart, recycle, rndc commands, etc. All of those require admin access to the nameserver instances in question. But

Re: Refreshing cache in other DNS servers

2013-10-15 Thread Mark Andrews
In message 525d9517.6050...@chrysler.com, Kevin Darcy writes: There's no way within the DNS protocol itself to reach out and tell a nameserver to purge an entry in its cache that hasn't expired yet. There are out of band ways: e.g. restart, recycle, rndc commands, etc. All of those

Re: Refreshing cache in other DNS servers

2013-10-15 Thread babu dheen
Thanks a lot . Now its very clear.   Regards Babu On Tuesday, 15 October 2013 6:28 PM, Steven Carr sjc...@gmail.com wrote: On 15 October 2013 15:53, babu dheen babudh...@yahoo.co.in wrote:   If I change the TTL value on the particular zone after modifying a  record in Redhat Linux BIND