Entries Related to ‘Monitoring’

The Wireshark network protocol analyzer can zero in on just the network traffic you want to see to tell you things like whether your encryption is working, or find infected hosts on your network.

You can enhance the Nagios network monitoring application with plugins. One especially useful plugin lets Nagios monitor the health of your cluster instead of that of individual hosts.

With Xymon, you can monitor the health of thousands of servers and applications, and the network connectivity among them. Xymon has some interesting advantages for administrators over alternatives like Nagios and Big Brother.

Nmap is a powerful utility for scanning your network and discovering all kinds of information about who is on it and what they’re doing. You can discover used and unused IP addresses, hostnames, services, and operating systems, and their versions – information that can help you monitor who is on your network, and lead you to unsafe or unauthorized servers.

The Wireshark packet analyzer is several tools in one application. You can use it to analyze the structure of your wireless network in search of potential configuration errors. It can identify many types of encapsulation and isolate and display all the fields that make up a network packet. And of course, it also works as a packet sniffer. By using filters with Wireshark, you can zero in on just the data you care about.

Snort, the open source intrusion detection and prevention system, is immensely powerful, but to get the most out of it, you need to configure it correctly for your own setup. Here are some performance tips for dealing well with alerts, looking at alert monitoring, streamlining false positives and genuine but frequent real positives, and logical rule optimization.

Snort, the open source intrusion detection and prevention system (IDS/IPS), can be a fabulous tool to protect your network from attack – if it’s set up correctly. If it’s not, it can cause network traffic and performance problems. Here’s a rundown of how to use Snort’s built-in profiling tools to tune your setup and improve Snort’s performance.

Nagios lets you monitor your entire infrastructure so you can detect and repair problems before they halt business. Because it uses a plugin architecture, you can easily extend Nagios to do just what you want. Here are some great plugins that make this useful tool even more indispensable.

With Nagios, the leading open source infrastructure monitoring application, you can monitor your whole enterprise by using a distributed monitoring scheme in which local slave instances of Nagios perform monitoring tasks and report the results back to a single master. You manage all configuration, notification, and reporting from the master, while the slaves do all the work.

What should you do if your JBoss application slipped into unconsciousness, requests just hang, and your logs don’t show anything useful? This tutorial will guide you through basic JBoss paramedic techniques you can use to check your application’s vital signs.