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Nagios

Probably the best known free tool, and it comes to no surprise since they’ve been working in the U.S. since 1996 to build this monitoring software. Its core is the most important part of the tool and it allows you to build plugins within that core, to monitor particular elements.

It’s interesting to see how the demand tendency on the Internet has been diminishing with the passage of time. What before was one of the most potent and well-known network tools, is losing terrain.
It’s large-scale use is due to the fact that it was the first one to develop a tool that covered unexpendable characteristics in a network monitoring process. For this reason, Nagios was very popular. Furthermore, given its great initial market penetration, it’s still quite used.

Advantages

There are a lot of professional profiles with Nagios experience
If there is a good knowledge of the tool involved, manual configuration can turn Nagios into a very powerful tool to monitor isolated or particular cases
It has a large plugin offer to adapt the product to the user’s final needs
Basic configuration is very easy
Inconveniences

Editing or configuration processes are difficult due to the necessity to make manual modifications in order to properly set up the tool
The GUI lacks user-friendliness.
Steep and costly learning curve
Every installation ends up being a “puzzle” where rather than having a standard product, we finish with a personal appliance with hundreds of patches, self-made or third-party codes. All this apart from it being complicated to evolve or maintain by said third-parties.
Simple reports
Very lacking when it comes to SNMP, both in polling and trap management.
Review
In a nutshell, Nagios was the origin for monitoring and, as a matter of fact, lots of new network monitoring tools have inherited the Nagios code and made it evolve. Even though you may have a lot of professional profiles on the market, these must have a very vast knowledge of the program, and your installation will depend on them 100%. Future migrations may also be complicated.

Open version: yes


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Zabbix
Created by a Lithuanian company in 2005, Zabbix is known for being easy to configure and for having a very powerful GUI. It’s performance starts to decline when a large quantity of nodes is to be monitored. It’s agentless monitoring service stands out above the rest in its category, and experience tells us you can monitor up to 10,000 nodes without performance issues.

Advantages

It has quite an active community
At low levels, it’s still very strong and efficient.
Disadvantages

Even though it has been used for large installations, starting at 1,000 nodes its performance can be diminished
It’s difficult to create and define alert and report templates. Configurations can require many clicks and steps to be completed
It doesn’t include real-time reporting
Difficult to purge when there are errors
Poor SNMP trap treatment

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PRTG Network Monitor
Network monitoring tool that stands out for its greatly designed and easy to use interface. It has a great vantage point when it comes to configuring alerts flexibly and because of its report generating capacities. The free version (which is NOT open) is limited to monitoring 100 application types.

PRTG is an application that can only be executed on Windows machines as a part of Microsoft Network Monitoring. Anyway, we highlight that the monitoring is multi-platform and is also able to monitor virtual systems and cloud applications. It can also generate real-time reports.

Advantages

Very nice interface with awesome data navigation possibilities.
You can access monitoring from mobile devices
Reports can be in PDF/HTML formats
Very powerful and flexible alert system
Disadvantages

Certain plugins require additional Microsoft user licenses, therefore costs can skyrocket easily
Limited scalability
Very rigid when implementing its own checks
Hard to deploy in environments with a complex connectivity
Quite inefficient when it comes to server or application monitoring
Review
Open version: Yes, but very reduced

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Solarwinds
Network monitoring tool that excels for its automatic network and node mapping, without the need to manually activate it. This is added to a very powerful GUI that allows you to easily view your network topology and its status. Solarwinds also allows integrating virtual machines in its monitoring.

Its tendency shows that after a crushing success experienced during 2004 and 2005, a descent happened in which they’re now relatively stagnated.

Advantages

Great GUI
Wonderful community backing it
Mobile device access
Disadvantages

File and manual configuration for alerts
The report generation system still has room to improve
It doesn’t have integration with cloud applications such as Amazon
You cannot perform all actions from the same panel and you’ll always require to access other tools
Its licensing forces the user to constantly look at every check performed, since licensing is individually done for these.

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Zenoss
Zenoss comes from an American enterprise that has created this software to monitor storage, networks, servers, applications, and virtual servers. Its agentless monitoring is what makes it stand out. It has a “Community” version with very few features and a full-feature Commercial license.

Advantages

All terrain regarding platforms. It’s capable of cross-platform monitoring
It presents a very flexible and tweakable dashboard, which is quite powerful as well
Great flexibility and potential in the event management offer.
Disadvantages

Depending on the installation’s complexity and on what elements need to be monitored, adapting it can be a rough task
The DataBase layer can get large and heavy in large environments.
The panel can be slow on certain installations.
It only has MySQL and its own database, lacking integration with other DataBase systems.
Topology maps are one of the weakness of the product.

#monitoring

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راهنمای استفاده از کیف های سخت افزاری برای ذخیره سازی بیت کوین، اتریوم و ...به کمک دستگاه Ledger Nano S
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هر تکنسین فنی کامپیوتر این کتاب فوق العاده را بهتر است بخواند.
#A+
#Comptia
#Hardware

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روش درست انتخاب چاپگرهای ID Card
چاپ کارت های شناسائی، بانکی و ...
#IDCard
#Printer

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راهنمای مدیران برای استفاده از SharePoint
#SharePoint
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راهنمای کامل پایثان
#Python
#Programming

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شبکه های کامپیوتری
یک رویکرد بالا به پائین
#Networking
#TopdownApproach

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