Tag: network monitoring

Link: Easily Find Out Which Process Is Using Too Much Bandwidth in Linux

While there are many network monitoring tools available for Linux, most of them monitor network traffic to and from your computer or a particular interface. However, there are times when you want to nail down a particular process that’s using up too much of the bandwidth, and there is a tool, dubbed NetHogs, that lets you do just that.

In this article, we will discuss the basics of NetHogs as well as the features it provides.

Full article here:
Easily Find Out Which Process Is Using Too Much Bandwidth in Linux (Make Tech Easier)

Link: Top 30 Nmap Command Examples For Sys/Network Admins

Nmap is short for Network Mapper. It is an open source security tool for network exploration, security scanning and auditing. However, nmap command comes with lots of options that can make the utility more robust and difficult to follow for new users.

The purpose of this post is to introduce a user to the nmap command line tool to scan a host and/or network, so to find out the possible vulnerable points in the hosts. You will also learn how to use Nmap for offensive and defensive purposes.

Full article here:
Top 30 Nmap Command Examples For Sys/Network Admins (nixCraft)

Link: List of Free And Open Source Monitoring System

The Linux monitoring systems are often used to follow system resources, such as CPU load, the amount of free RAM, network traffic statics or memory consumption. Which are ones from the most important tasks for every administrators. Furthermore, those tools notify the network administrator (via email, SMS or other alarms) when something interrupts or goes down which makes their life easier.

From those monitoring tools we will list the 7 most important in this article which will be described and identified by giving their features and mentioning their current version.

Full article here:
List of Free And Open Source Monitoring System (Unixmen)

Link: Linux ntopng – Network Monitoring Tool Installation (Screenshots)

Nowdays computers are connected between each other. From the small area such as your home Local Area Network (LAN) until the the biggest one which we call – Internet. When you are managing a network computer, you are managing one of the most critical component. Since most of developed application is web based application, the network between critical.

There is why we need a network monitoring tool. One of the best network monitoring tool is called ntop. From Wikipedia “ntop is a network probe that shows network usage in a way similar to what top does for processes. In interactive mode, it displays the networkstatus on the user’s terminal. In Web mode, it acts as a web server, creating a HTML dump of the network status. It supports a NetFlow/sFlowemitter/collector, a HTTP-based client interface for creating ntop-centric monitoring applications, and RRD for persistently storing traffic statistics”

Now after 15 years, you will find ntopng – the next generation ntop.

What is ntopng

Ntopng is a high-speed web-based traffic analysis and flow collection. Ntopng is based from ntop. It’s run on every Unix platform, MacOS X and Windows.

Full article here:
Linux ntopng – Network Monitoring Tool Installation (Screenshots) (LinOxide)

Note that according to the ntopng download page, in addition to Linux, ntopng “should virtually compile on any Unix/Win32 platform.” However, we don’t know of any specific instructions for those platforms at this time.

Link: How to install and configure Nagios on Linux

Nagios is one of the most powerful network monitoring systems, which is widely used in the industry. It can actively monitor any network, and generate audio/email warnings and alerts when any problem is detected. The check types and alert timers are fully customizable.

Another incredible capability of Nagios is that it can monitor both hosts and services e.g., it can monitor IP addresses and TCP/UDP port numbers. To explain a little, let us assume that there is a web server that we want to monitor. Nagios can check whether the server is online by running ping on the IP/name of the server as well as it can be set up to provide warnings in case the round trip time (RTT) to the server increases. Further, Nagios can also check whether TCP port 80 (web server) is reachable e.g., the server is online but Apache/IIS is not responding.

There are also 3rd party monitoring tools that are based on Nagios, such as Centreon, FAN , op5 Monitor, which supplement standalone Nagios engine in terms of interface, automation, and technical support.

This tutorial explains how to install and configure Nagios on Linux.

Full article here:
How to install and configure Nagios on Linux (Xmodulo)
Related:
Install And Configure Nagios on Ubuntu 14.04 LTS (Unixmen)