Richand and Vernon. Thanks for the replies.
Richard, I will look into the concept of a "fake" host entry. It sounds like a good workaround. I am not sure what the testip is for but I will look into it. For that matter, not sure if I still need the network option (comes from BB). I think I can remove it. Do not seem to see it in the Xymon docs.
The entries I presented earlier were not real. I wanted to keep it simple to help understand what I was trying to accomplish. Here is what I am running on (items changed to protect the innocent). It seems to be running correctly, but Xymon has been running for just 2 days so I am still learning its ins n outs.
BB-Hosts file:
192.168.14.15 bambam.domain.com # conn network prtdiag ftp smtp dns=smtp.domain.com
76.x.y.z ns1.domain.com # noconn dns=smtp.domain.com
Here are the results from Xymon DNS queries:
For bambam.domain.com
Service dns on bambam.domain.com is OK (up)
id: 60029
flags: qr aa rd ra
opcode: QUERY
rcode: NOERROR
Questions:
smtp.domain.com .A Answers: smtp.domain.com . 86400 A 192.168.11.15 NS records: domain.com . 86400 NS ns1.domain.com. domain.com . 86400 NS ns1.domain2.com. Additional records: ns1.domain.com . 86400 A 192.168.14.15 ns1.domain2.com. 86400 A 192.168.11.15 Seconds: 0.098
For ns1.domain.com
Service dns on ns1.domain.com is OK (up)
id: 2822
flags: qr aa rd
opcode: QUERY
rcode: NOERROR
Questions:
smtp.domain.com . A
Answers:
smtp.domain.com . 86400 A 71.a.b.d
NS records:
domain.com . 86400 NS ns1.domain2.com.
domain.com . 86400 NS ns1.domain.com.
Additional records:
ns1.domain.com . 86400 A 76.x.y.z
ns1.domain2.com. 86400 A 71.a.b.c
Seconds: 0.099Please drop a note if you see something that is just does not seem correct.
Thanks, Mike
From: Vernon Everett [mailto:everett.vernon at gmail.com] Sent: Wednesday, November 03, 2010 7:01 PM To: xymon at xymon.com Subject: Re: [xymon] Can we verify the DNS response
Hi Mike
As Richard suggests, I suspect the config you proposed is going to cause Xymon, and yourself a world of hurt. Remember, Xymon uses the hostname as the index (for lack of a better word) Now you have the same host with 2 IP addresses. Xymon will perform 2 pings, using lookup to resolve IP. bbtest-net is going to bleat. I suspect, the IP address from the lookup is the one that will be used as the DNS server IP. So both DNS lookups will be to the same IP address.
I would suggest a simple script to do what you need.
Regards Vernon
On Thu, Nov 4, 2010 at 8:21 AM, Mike Cavanagh <mike at terrapintesting.com> wrote:
An entry in the bb-host file like:
192.168.10.10 bambam # dns=fred
will perform a DNS query against the server bambam for the hostname: fred. The way I understand it is if a response is received, the DNS is considered good.
I would like to know if here are any options to verify the result. In my particular case, we want to query against a "Split DNS" server and confirm the correct IP is being returned in the A record. So,
192.168.10.10 bambam.dom.com # dns=fred.dom.com
71.137.200.10 bambam.dom.com # dns=fred.dom.com
The first entry should return: 192.168.10.15
The second entry should return: 71.137.200.15
If DNS views are broken, the 2nd entry may return: 192.168.10.15 If so, I want to get a page so DNS can be fixed.
Thanks,
Mike