Entries Related to ‘Network’

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.

Whether you need more disk space or an easy way to share files on your network, you can turn to NFS, a distributed filesystem for which support is integrated in the Linux kernel.

Here’s how to create a simple, secure proxy server for your enterprise using Squid, ClamAV, and other open source applications.

OpenVPN provides a secure link back to your network for remote workers. Carla Schroder walks you through the process of setting up an OpenVPN server to authenticate and encrypt multiple client connections in less time than it takes to get a key made – almost.

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.

Businesses can use a good stout RADIUS server to authenticate any network client. Dial-up, DSL, virtual private networks (VPN), wireless networks – you name it, RADIUS will authenticate it. If you’re ready to learn how to set up a FreeRADIUS server to authenticate users for a wireless network, test new configurations safely, and configure a wireless access point and clients to use the new FreeRADIUS server, you’ve come to the right place.

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.