Agentless Vs Agent based

[Kevin Keane]

There is no such thing as "better" here - else everybody would just be 
using that method.

The difference is simply that agent-based Nagios monitoring requires 
that you install software on the client, while agentless monitoring 
allows you to monitor the computer from afar using SNMP, WMI and the 
like. Because an agent runs on the computer itself, it can access quite 
a bit of data that may not be available remotely - but at the same time, 
the agent is more intrusive and requires more configuration.

It is not unusual to use both methods at the same time, actually.

Also, you have different security considerations for agentless vs. 
agent-based monitoring. Agentless monitoring requires that you enable 
SNMP, WMI, and/or other remote-access technologies. Agent-based 
monitoring requires that you put additional software (the agent) onto 
the monitored computer, and usually that software has to run as root or 
administrator or local system or a similar account with high 
permissions. Every time you add software to a computer, you also add 
potential exploits.

chethan.mnc at wipro.com wrote:
>
>  
>
> Dear Experts,
>
>  
>
> What are the differences and advantages b/w agentless nagios setup and 
> agent based (NRPE, NSCclient) Nagios monitoring.
>
>  
>
> Please help me in understanding which is better to go with Agentless 
> or Agent based.
>
>  
>
> Please Help.
>
>  
>
>  
>
> *Thanks & Regards,*
>
>  
>
> *Chethan M N,*
> Sr Engineer - EMS
>

-- 
Kevin Keane
Owner
The NetTech
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