[Check_mk (english)] dns lookup

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

···

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

···

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.

···


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list

checkmk-en@lists.mathias-kettner.de

http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

Darin,

I was going to use one of the nagios plugins, but I wanted to see what check_mk itself provided for doing this. I’m trying to do most of my work through check_mk, as opposed to nagios plugins where possible.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

···

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 5:27 AM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

I’ve added the check_dns nagios plugin to the mrpe.cfg file of the nagios/check_mk host. When I manually run the plugin it works fine and gives me me the expected results. In check_mk I get the result “No output returned from plugin”. Here’s the entry in mrpe.cfg:

“DNSLOOKUP /usr/local/nagios/libexec/check_dns -H google.com -s mydnsserver”

Any ideas why the plugin isn’t working in check_mk, but does work from the command line?

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

···

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 5:27 AM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

Please disregard my last question as to why the plugin wasn’t working in check_mk. I had included in my mrpe.cfg the working DNS LOOKUP, thinking that this would give me a better description when I looked at this service in check_mk. Apparently the LOOKUP part was causing me issue. When I removed it, leaving only the DNS portion, the plugin worked properly in check_mk.

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

···

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 5:27 AM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

I understand the approach your taking but I think you’ll find that using a hybrid of the two is the best approach. check_mk is meant to replace the client side checks which would normally be executed by NRPE, check_by_ssh, nsclient, etc, not the remote checks the nagios server runs. I realize it would be nice if you could use check_mk to configure all aspects of nagios, even the nagios plugins, but that’s kinda outside the scope of check_mk…at least for now.

···


Later,
Darin

On Tue, Oct 18, 2011 at 12:33 PM, David Lynum david.lynum@wacapps.net wrote:

Darin,

I was going to use one of the nagios plugins, but I wanted to see what check_mk itself provided for doing this. I’m trying to do most of my work through check_mk, as opposed to nagios plugins where possible.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 5:27 AM

To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

Darin,

Thanks for your answer. What would help me, and I’m sure others, is if the documentation were to be presented in such a way is to show both the nagios and check_mk requirements for checks. Perhaps a matrix, which would show that if you want to run a certain check, does it require something from nagios. If yes, show the nagios configuration specifically for that check, along with the check_mk configuration. I understand that more work needs to be done with the documentation. But I think that my approach might help more, since check_mk is dependent on nagios to do what it does.

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

···

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 10:39 AM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

I understand the approach your taking but I think you’ll find that using a hybrid of the two is the best approach. check_mk is meant to replace the client side checks which would normally be executed by NRPE, check_by_ssh, nsclient, etc, not the remote checks the nagios server runs. I realize it would be nice if you could use check_mk to configure all aspects of nagios, even the nagios plugins, but that’s kinda outside the scope of check_mk…at least for now.


Later,
Darin

On Tue, Oct 18, 2011 at 12:33 PM, David Lynum david.lynum@wacapps.net wrote:

Darin,

I was going to use one of the nagios plugins, but I wanted to see what check_mk itself provided for doing this. I’m trying to do most of my work through check_mk, as opposed to nagios plugins where possible.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Darin Perusich [mailto:darin@darins.net]
Sent: Tuesday, October 18, 2011 5:27 AM

To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Why don’t you just use the check_dns Nagios plugin to query the server? It’s bundled with the nagios-plugins on OpenSuSE and is probably just what your looking for.


Later,
Darin

On Mon, Oct 17, 2011 at 8:15 PM, David Lynum david.lynum@wacapps.net wrote:

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en


checkmk-en mailing list
checkmk-en@lists.mathias-kettner.de
http://lists.mathias-kettner.de/mailman/listinfo/checkmk-en

Hi David,

I think the Nagios plugin is currently the only one fit to check this.

As for my remark. I’ve had a simular situation where one of the routers was

not showing ipv6 lookups (512 size packages max). As a test we turned of eDNS

in the ad server and the checks hardly showed any warning.

The real fix would be to let eDns packages pass the specified router.

Best regards,

Hans

···

From: David Lynum [mailto:david.lynum@wacapps.net]
Sent: Tuesday, October 18, 2011 2:15 AM
To: Hans Wolters
Cc: checkmk-en@lists.mathias-kettner.de
Subject: RE: [Check_mk (english)] dns lookup

Hans,

Thanks for your response. But I’m not sure how your recommendation is going to help me with dns lookup. Can you please clarify?

Thank you

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
david.lynum@wacapps.net

6210 Stoneridge Mall, Road Suite 400 Pleasanton, CA 94588

www.wacapps.net

From: Hans Wolters [mailto:j.wolters@piramide.nl]
Sent: Thursday, October 13, 2011 2:51 PM
To: David Lynum
Cc: checkmk-en@lists.mathias-kettner.de
Subject: Re: [Check_mk (english)] dns lookup

Hi David,

Check and see if you switches or firewalls are only allowing 512 bytes to pass. 2008rc2 is

enabled to use edns, ipv6, by default. If ipv4 only solves your problem you do have a problem

with one of the switches/firewalls.

Sent from my iPet 2

On Oct 13, 2011, at 11:31 PM, “David Lynum” david.lynum@wacapps.net wrote:

I’m running check_mk 1.1.10p3, with Nagios 3.3.1, on Centos 5.

We have a Windows 2008 R2 server that’s providing DNS for our network. For some reason the DNS service crashed, but the Windows event viewer showed that its status was still running. Restarting the DNS service resolved the issue, but now I need to both monitor the DNS service and make sure that it’s indeed running. I’ve modified my main.mk to add a check to monitor the DNS service, and that’s working. But is there a way to do a DNS lookup, so that I can verify that the DNS service is working? I could use a Nagios plugin, but I’d like to see what I can do with Check_mk itself.

Thanks

David Lynum

IT Support Lead, Wholesale Applications Community (WAC)

Desk: +1 (925) 201-8520
Email:
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