Re: bind-users Digest, Vol 2230, Issue 1

2015-10-20 Thread Grant Taylor
On 10/20/2015 08:49 AM, Harshith Mulky wrote: > We have an implementation where, once the DNS Servers are down, The > Client (Our device) Blacklists the IP address of DNS Servers for some > period of Time How long is "some period of time"? Is it something reasonable (read: minutes) or something

Re: bind-users Digest, Vol 2230, Issue 1

2015-10-20 Thread Mark Andrews
In message , Harshith Mulky writes: > > No Mark, This is not a question I am asked to answer for some course > > We have an implementation where, once the DNS Servers are down, The > Client (Our device) Blacklists the IP address of DNS Servers for some > period of Time > It can only whitelist the

RE: bind-users Digest, Vol 2230, Issue 1

2015-10-20 Thread Harshith Mulky
oes it periodically send any messages to the server. What Kind of messages > are required by the client to be sent towards server to determine if the DNS > IP is reachable or not? > > Thanks > Harshith > > -- next part -- > An HTML attachment was scrubbed...

Re: How does a Client Verify if the DNS server is Alive or down

2015-10-20 Thread Reindl Harald
Am 20.10.2015 um 13:26 schrieb Steven Carr: On 20 October 2015 at 10:41, Phil Mayers wrote: On 20/10/15 07:26, Harshith Mulky wrote: How can a Client verify if the DNS Server is Running(named service is Running) or Down? By the presence or absence of a reply to a query. That doesn't alwa

Re: How does a Client Verify if the DNS server is Alive or down

2015-10-20 Thread Steven Carr
On 20 October 2015 at 10:41, Phil Mayers wrote: > On 20/10/15 07:26, Harshith Mulky wrote: >> >> Hi All, >> >> How can a Client verify if the DNS Server is Running(named service is >> Running) or Down? > > > By the presence or absence of a reply to a query. That doesn't always verify if the serve

Re: How does a Client Verify if the DNS server is Alive or down

2015-10-20 Thread Phil Mayers
On 20/10/15 07:26, Harshith Mulky wrote: Hi All, How can a Client verify if the DNS Server is Running(named service is Running) or Down? By the presence or absence of a reply to a query. Does it periodically send any messages to the server. No. It just sends a query when it has one, and wa