Top 10 Freeware Network Security Tools

1. Nessus DOWNLOAD

Nessus is a Network Vulnerability Scanner tool based on a client-server model. It features high speed discovery, configuration auditing, asset profiling, and vulnerability analysis of your network and systems. It is constantly updated with more than 11,000 plugins for the free version. Every audit in Nessus is coded as a plugin : a simple program which checks for a given flaw. Plugins can be enabled or disabled accordingly, depending on the kind of Vulnerability analysis required for the specific network. Nessus works on Windows, Linux, OpenBSD, FreeBSD and other Unix flavors.


Arguably one of the best network intrusion detection and prevention systems (IDS) is the free and open source Snort toolkit. Through protocol analysis, content searching, and various pre-processors, Snort detects thousands of worms, vulnerability exploit attempts, port scans, and other suspicious behavior. Snort works on many operating systems, including Windows, Linux, Solaris, FreeBSD etc. Snort utilizes a rule-based language that combines the benefits of signature inspection, protocol inspection, and anomaly-based inspection. You can configure Snort to run in a few different modes such as Sniffer mode, Packet Logger mode, and Network Intrusion Detection (NIDS) mode. Continue reading “Top 10 Freeware Network Security Tools”

Top 5 Freeware Tools for Network Admins

1. PuTTY for SSH Access DOWNLOAD

PuTTY is a Secure Shell (SSH) client that runs on Windows. You can use PuTTY to access remote network devices (Routers, switches, firewalls, Unix Servers etc) using the secure SSH protocol. With an increased emphasis on security, most network devices can now be remotely accessed via SSH. PuTTY supports SSH versions 1 and 2 along with Data Encryption Standard (DES), Triple DES (3DES), and Advanced Encryption Standard (AES). With a single click of a button, you can also log a session for later review. PuTTY also supports Telnet.


Most network devices use the Trivial File Transfer Protocol (TFTP) as the primary way to transfer system image files or configuration files, so a simple, stable TFTP server is an essential part of a network administrator toolkit. PumpKIN TFTP server provides a simple, easy to use GUI and runs on all versions of Windows. PumpKIN also plays .wav files to provide audio alerts indicating the state of a TFTP transfer- A feature that is very handy for multitasking network administrators. Continue reading “Top 5 Freeware Tools for Network Admins”