On 4/19/2010 2:59 AM, Axelis wrote:
To develop our custom application, we would use the Java Port of Nagios, Blue. 
Nagios (Blue) seems to be a good solution but our client prefer an agent-less solution. They don't want to install anything on their side.

I heard Nagios can be used without installing an agent. But I couldn't find how. We don't need real-time monitoring, a few minute delay is acceptable. Do you have any info on that?

Some things can be monitored without an agent, but others can not.  You'll be able to check anything that's available through TCP, UDP, ICMP, or SNMP without an agent, which would include such things as:
Is the host pingable?
Does a web server appear to be running on port 80?
SNMP status queries

You will not be able to get information about anything internal, like disk usage or host load, without an agent unless it is made available through SNMP.
Tony Yarusso
Technical Team
Nagios Enterprises, LLC
Email:  tyarusso@nagios.com
Web:    www.nagios.com