10 Free Server & Network Monitoring Tools that Kick Ass

By Ben Dowling When you have a website or a network, it’s helpful to be aware of any issues as soon as they occur. There are open source and freeware server/network monitoring tools that will supervise your infrastructure for any issues that may arise. These tools are meant to aid you in avoiding being taken offline and evaluating if your resource needs has outgrown your infrastructure. In this article, we review our top 10 server/network monitoring tools. 1. Monit not only monitors your server, but also attempts to remedy problems by taking predefined actions for certain situations. If you have more than one server that you need to monitor, then you can use M/Monit– an extended version of Monit that provides a simple way to monitor multiple machines. There’s also an iPhone app available for M/Monit to help you conveniently check on your network without lugging around a laptop around. 2. When you have a cluster of machines, it’s difficult to see how the whole cluster is doing all at once.

Syncless Follow some of us on Twitter: @Syncless @Wysie_Soh @kelltainer @ZwodahS Update May 22, 2010: For those who have tested the network drive, please post in the discussion group and let us know =). Syncless 2.1 is up. added Minimize On startup options. Network Drive For those having problem regarding network drive, try mapping the network drive to a drive letter and set the respective permission. "Syncless is a work of beauty combined with superb functionality. "You won't find a shortage of file syncing applications, but Syncless is the first we've reviewed that supports tag-based synchronization. "Overall we liked the concept of tags for file sync and Syncless proved to be a really useful application." - Life Rocks 2.0 Syncless comes under international spotlight - Baixa.br Ferra.ru Why Tagging? Why Syncless? What makes Syncless so unique is the way synchronization is performed. The concept of tagging has been applied by notable applications in various interesting ways. Why Another Sync Tool?

10 Cool Ways to Use Nmap Nmap (“Network Mapper”) is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. In addition to my list you can also check out this Comprehensive Guide to Nmap here and of course the man pages Here are some really cool scanning techniques using Nmap 1) Get info about remote host ports and OS detection nmap -sS -P0 -sV -O <target> Where < target > may be a single IP, a hostname or a subnet -sS TCP SYN scanning (also known as half-open, or stealth scanning) -P0 option allows you to switch off ICMP pings. -sV option enables version detection -O flag attempt to identify the remote operating system Other option: -A option enables both OS fingerprinting and version detection -v use -v twice for more verbosity. nmap -sS -P0 -A -v < target > 2) Get list of servers with a specific port open

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Beginner's Guide to Nmap Ever wondered how attackers know what ports are open on a system? Or how to find out what services a computer is running without just asking the site admin? You can do all this and more with a handy little tool called Nmap. What is Nmap? It's famous, too. In this tutorial, I'll cover some of the basics of using Nmap and provide some examples you can use quickly. Getting Nmap and Basic Use You'll find Nmap packaged for most major Linux distros. The basic syntax for Nmap is Nmap Scan Type Options target. nmap -O target.host.com Note that Nmap requires root privileges to run this type of scan. Starting Nmap 5.21 ( ) at 2010-02-27 23:52 EST Nmap scan report for 10.0.0.1 Host is up (0.0015s latency). As you can see, Nmap provides a lot of data. Here's the result of another scan, against a desktop machine running Ubuntu 9.10: Starting Nmap 5.21 ( ) at 2010-02-28 00:00 EST Nmap scan report for 10.0.0.6 Host is up (0.0039s latency). Practice Hosts Multiple Hosts Zenmap