I have a couple of name servers which are not pingable. I have them in my hosts.cfg as follows:
10.10.10.10 ns1-int.foo.com # noconn dns=ns1.foo.com 0.0.0.0 ns2-int.foo.com # noconn dns=ns2.foo.com
The first returns a green dns test result. The second returns a red "Service dns on ns2-int.foo.com is not OK : Service unavailable." I can't figure out why. I don't want to embed ip addresses in my hosts.cfg, and I can't think why I should need to.
There is nothing telling when I run the test interactively with: xymoncmd xymonnet --no-update --debug ns1-int.foo.com nor for ns2-int.foo.com
When I snoop the interface while doing the above tests, the differences are significant:
For ns1-int, I see xymon lookup ns1-int on the normal name server. Then I also see it request ns1.foo.com from ns1-int.foo.com and get the correct response. I'm not sure why the reverse lookup is there.
xymona -> d.foo.com DNS C ns1-int.foo.com. Internet Addr ?d.foo.com -> xymona DNS R ns1-int.foo.com. Internet Addr 10.10.10.10 xymona -> ns1-int.foo.com DNS C ns1.foo.com. Internet Addr ? ns1-int.foo.com -> xymona DNS R ns1.foo.com. Internet Addr 192.168.123.1 xymona -> d.foo.com DNS C 10.10.10.10.in-addr.arpa. Internet PTR ? d.foo.com -> xymona DNS R 10.10.10.10.in-addr.arpa. Internet PTR ns1-int.foo.com.
For ns2-int, however, the result is much simpler. I see xymon lookup ns2-int on the normal name server. . . . and then nothing.
xymona -> d.foo.com DNS C ns2-int.foo.com. Internet Addr ?d.foo.com -> xymona DNS R ns2-int.foo.com. Internet Addr 10.20.20.20
When I change the line in hosts.cfg for ns2-int from 0.0.0.0 to an ip address, it works fine.
What is going on here? Why isn't the DNS test using the address it has obviously retrieved from DNS?
Do things because you should, not just because you can.John Thurston 907-465-8591 John.Thurston at alaska.gov Enterprise Technology Services Department of Administration State of Alaska