diversos aplicativos para monitoramento

Centreon

monitoramento, construido sobre o "core" do nagios


OCommon

este daqui é para um sistema completo de help-desk, em php, com inventario de maquinas, demora de atendimento, etc.

referencia para instalação em artigo no vivaolinux


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gerenciamento de recursos de TI
com o glpi

osTicket
sistema de suporte de ticket que (aparentemente) é bem simples:
"There are so many open source products that claim to be easy to install and configure, but few deliver. osTicket really is easy to install and configure! I can see that it is quite configurable if you want to tweak it, but I could not believe how quick I was up and running with a ticket system allowing e-mail generated tickets (with attachments). Incredible."

OTRS
OTRS is an Open source Ticket Request System (also well known as trouble ticket system) with many features to manage customer telephone calls and e-mails. The system is built to allow your support, sales, pre-sales, billing, internal IT, helpdesk, etc. department to react quickly to inbound inquiries. Do you receive many e-mails and want to answer them with a team of agents? You're going to love the OTRS!

ferramentas diversas para monitoramento

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para monitorar banda sem o peso do Cacti - usando o symon/symux

Install Symon / Symux + Syweb on FreeBSD 7.2

monitoramento com Symon no (Open|Free) BSD

cálculo de periodos de tempo, dias, para monitoramento com symon/symux:

cálculo entre datas (exemplos):
s=`date +%s -d '20090912'`-`date +%s -d '20090913'`

s=`date +%s -d '2 days ago'`-`date +%s -d '1 day ago'`

monitoramento pelo PF-firewall (esta é a home page)

monitoramento pelo PF-firewall com IPA - aqui documentação e downloads

tutorial - Analise de tráfego e consumo de banda com o Bandwidth (FreeBSD)


Monitorando seu FreeBSD com o Munin

"Munin is a monitoring tool available in the FreeBSD ports. It tracks the vital signs of your servers and charts everything on graphs by day, week, month and year. It makes it easy to see when your server gets spikes of traffic and how well it handles them. It can also show you how your traffic is increasing over the month or year so that you can plan out when you will need to upgrade or add more servers."