I'm testing Zenoss 2.1.1 running on Debian Etch right now. We're
going to monitor other Debian Etch servers through net-snmp. So far,
we're very impressed by it. We're even considering the Enterprise
version.
But I have this weird issue with zenmodeler and Linux hosts. It
will miss basic services such as Apache running on TCP/80. That much
is not a big issue, considering the time we'll be saving compared to
configuring Nagios.
Now, every now and then, my machines are being remodeled by
zenmodeler, and it's removing services by itself. How do I stop it
from doing this? It's not doing it for network devices such a Cisco
switch or for Windows machines. It's very annoying, and I don't
want to have to lock all IpServices just because of it.
Anyone ever encountered problems like that? So far I've seen it
happen with LDAPS, HTTP, HTTPS and SSH. And only for Linux hosts.
Using the portscan variant of IpServiceMap will work as you have
discovered. The reason the snmp variant isn't working has to do with
IPv6. Net-SNMP has problems reporting on services that listen on
the :::80 port rather than the traditional IPv4 0.0.0.0::80. LDAPS,
HTTP, HTTPS and SSH are common examples of these. If you aren't using
IPv6 on your network you can fix this by disable IPv6 in your kernel.
Otherwise, take a look at the solution for "Why doesn't httpd show up
in my list of services?" question in the FAQ.
FAQ: http://www.zenoss.com/community/docs/faqs/faq-english/
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