telman
asked on
DNS Question
Hello,
We are running MS DNS server on Windows 2000 and I have question regarding secondary DNS configuration:
My name servers:
Primary name server: ns1.mydomain.com
Secondary name server: ns2.mydomain.com
Here is the problem:
When primary server goes down secondary server does not take over, in fact when go to zone property on secondary server it says "DNS Zone not loaded". I checked my zone and it contains NS records and I have both name servers defined in zone propriety.
Also it says zone is expired. I am thinking my secondary takes over but then drops the zone because zone expires after one hour or one day and it can not get any updates from primary dns server.
Is this suppose to be like this? or Secondary should be available even primary is down and zones are expired.
Tahnks,
Telman
We are running MS DNS server on Windows 2000 and I have question regarding secondary DNS configuration:
My name servers:
Primary name server: ns1.mydomain.com
Secondary name server: ns2.mydomain.com
Here is the problem:
When primary server goes down secondary server does not take over, in fact when go to zone property on secondary server it says "DNS Zone not loaded". I checked my zone and it contains NS records and I have both name servers defined in zone propriety.
Also it says zone is expired. I am thinking my secondary takes over but then drops the zone because zone expires after one hour or one day and it can not get any updates from primary dns server.
Is this suppose to be like this? or Secondary should be available even primary is down and zones are expired.
Tahnks,
Telman
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SOLUTION
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ASKER
Sorry, Probably I did not provide enough information. We are small ISP and we host web sites and dns zones accordingly. If primary dns server server goes down, secondary dns server should be serving dns requests however it does not happen. In short if primary is down my secondary server is useless. Is this normal?
I know as a workaround I could have two independent primary dns servers instead primary and secondary.
If it is not possible why microsoft had option for secondary dns service for years before active directory?
Thank you for your time.
Telman
I know as a workaround I could have two independent primary dns servers instead primary and secondary.
If it is not possible why microsoft had option for secondary dns service for years before active directory?
Thank you for your time.
Telman
Have you configured zone transfers correctly? If the client has both servers in their DNS entries, a failure of the Primary should not matter since they should look to the secondary.
ASKER
>Have you configured zone transfers correctly?
So far I know yes, when primary server is up I can go to ns2 and display zone and its records on secondary zone and I can do dns lookup and ns2 will respond thos queries.
>If the client has both servers in their DNS entries,
Yes, they do. For example test.com uses ns1.mydomain.com and ns2.mydomain.com for name servers.
When primary is down I can not do look ups for test.com using secondary name server. So far only thing I can think of is that my zones are expiring in short time period. I am not sure what is the correct behavior for secondary dns server if zone set to expire in one hour. Will it be serving dns requests for test.com or will it drop it? I did not find any paper regarding this so I need to confirm this or find the solution to this problem.
Thank you for your time,
Telman
So far I know yes, when primary server is up I can go to ns2 and display zone and its records on secondary zone and I can do dns lookup and ns2 will respond thos queries.
>If the client has both servers in their DNS entries,
Yes, they do. For example test.com uses ns1.mydomain.com and ns2.mydomain.com for name servers.
When primary is down I can not do look ups for test.com using secondary name server. So far only thing I can think of is that my zones are expiring in short time period. I am not sure what is the correct behavior for secondary dns server if zone set to expire in one hour. Will it be serving dns requests for test.com or will it drop it? I did not find any paper regarding this so I need to confirm this or find the solution to this problem.
Thank you for your time,
Telman
SOLUTION
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ASKER
what is the secondary DNS server have set as its primary source of info?
When I do set up secondary zone on slave server I always show primary server ip address as a source so this way it will get the copy of dns zone. I do not know any other way to synchronize secondary with primary.
For example If I change host ip address in primary zone on master server, master server will notify the slave server about zone updates and dns synchronization will occur.
When I set up master and slave dsn servers I was sure that secondary will be available if primary is not bur turns out not.
So I want to know what I am missing here.
Thank you for your time.
Telman
When I do set up secondary zone on slave server I always show primary server ip address as a source so this way it will get the copy of dns zone. I do not know any other way to synchronize secondary with primary.
For example If I change host ip address in primary zone on master server, master server will notify the slave server about zone updates and dns synchronization will occur.
When I set up master and slave dsn servers I was sure that secondary will be available if primary is not bur turns out not.
So I want to know what I am missing here.
Thank you for your time.
Telman
ASKER
Hi,
I just did a testing, So I was right my zones were expiring that is why it was becoming unavailable on secondary dns server. I was able to change them and it works ok now.
I am closing this question. Thank you for your time.
Telman
I just did a testing, So I was right my zones were expiring that is why it was becoming unavailable on secondary dns server. I was able to change them and it works ok now.
I am closing this question. Thank you for your time.
Telman
ASKER
Who should I give points here? Spliting will be ok?
Please advise.
Thanks,
Telman
Please advise.
Thanks,
Telman
ASKER
Thanks,
Telman