You say you have port 161 open on the border firewall, do the windows
machines have their firewalls enabled and are blocking port 161?
-Gius
arly arly wrote:
HI Richard,
thank you for comment.
comunity string I set up as for machines I have it works OK. Comunity
string is same, and let say it is "niceday" but it is same on all
machines I have plan to monitor.
I tried all, but it I am really stuck, same configuration ( which I
btw just copy /paste to machines behind firewal ) works corretly on
machines which are direct accessable from nagios server.
I have port 161 open.
Thank you all for comment, I need to hear your experiences regarding this
Kind regards,
Arlytex
2009/8/6 Richard Remington <[email protected]>:
Hi Arlytex,
Is it possible that the SNMP password (community string) is not 'public' on
your Windows 2003 servers that are behind the firewall? Perhaps if they're
behind a firewall, someone also went to the trouble to change the SNMP
community string (password) to reach them?
Regards,
Richard
arly arly wrote:
Hi all,
I am using nagios3 and I would like an monitoring system for my
network. I have cca 10 hosts in "my network" but they are behind
firewall.
I mean in "my network" which is not exposed to outside world, some
machines are behidn firewals in.
Critical machines run Windows 2003 server OS, and I tried to use
NSClient++, in combination with check_nrpe ( I tried both ports 5666
and 12489 ) and I can get information from windows servers--checking
them with check_nrpe looks ok.
Then I realized that with SNMP I could better informations ( tested on
machines directly accessible from nagios server ) and decided to
copy/paste working SNMP configuration from windows machines and add
necessary servers to nagios conf files and have all unified via SNMP
monitoring. I am using *.pl scripts from
http://nagios.manubulon.com/snmp_storage.html and for machines
directly accessible all is ok
But I got into troubles for servers behind firewall :) Ports 161/162 (
UDP/TCP ) are open on firewal to windows servers
When I run
./check_snmp_storage.pl -H AAA.AAA.AAA.AAA -C public -m ^C: -w 80 -c
90 ( AAA.AAA.AAA.AAA address of win. machine behind firewal ) I am
getting an error
ERROR: Description/Type table : No response from remote host 'AAA.AAA.AAA.AAA'.
what means no return information from server. First I suspected on
connectivity and I moved SNMP to listen on another port, run command
./check_snmp_storage.pl -H AAA.AAA.AAA.AAA -C public -m ^C: -w 80 -c
90 --port 2222
but same issue ( this process works when I test it on machines which
are not behind firewall )
On windows machine netstat -a shows
UDP server:snmp *:*
UDP server:snmptrap *:*
what means snmp is listenning ( same configuration of SNMP service
works ok for machines which are in same net as nagios server )
I am suspection it could something to do with SNMP client / SNMP
protocol how it works, as I am getting correct response when I sent it
to 5666 + check_nrpe.
Any reasonable hint what I could check will very useful, so thank you
in advance. I am preety lost I do not really know what to check more
in order to resolve this.
Operating system I use for nagios server is Debian stable 5, I am very
sure configuration of SNMP on Windows servers is correct. HW I am want
to monitor are HP Proliants DL360 G5, DL380 G5
Kind regards,
Arlytex
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