| bwbar | Generates text and graphical readout of the current bandwidth usage. | |
| bwm-ng | A small and simple console-based live bandwidth monitor | |
| cacti | complete network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality | |
| cutter | TCP/IP Connection cutting on Linux Firewalls and Routers | |
| darkstat | Network statistics gatherer (packet sniffer). | |
| dnstracer | Determines where a given DNS server gets its information from, and follows the chain of DNS servers | |
| dsniff | Collection of tools for network auditing and penetration testing | |
| etherape | A graphical network monitor for various OSI layers and protocols | |
| ethstatus | A simple program for displaying commonly needed/wanted statistics in real time of incoming and outgoing traffic | |
| ettercap | A network sniffer/interceptor/logger for ethernet LANs - console | |
| fail2ban | Bans IPs after too many failed authentification attempts against common daemons | |
| fping | A utility to ping multiple hosts at once | |
| gnome-nettool | A Collection of GNOME3 Networking Tools. | |
| gnu-netcat | GNU rewrite of netcat, the network piping application | |
| hping | A command-line oriented TCP/IP packet assembler/analyzer. | |
| iftop | iftop does for network usage what top(1) does for CPU usage | |
| iptraf-ng | A console-based network monitoring utility (a fork of original iptraf) | |
| iptstate | top-like interface to netfilter connection-tracking table | |
| macchanger | A small utility to change you NIC's MAC address | |
| mrtg | Multi Router Traffic Grapher. | |
| mtr | Combines the functionality of traceroute and ping into one tool (CLI version) | |
| munin | A distributed monitoring/graphing tool | |
| nbtscan | NBTscan is a program for scanning IP networks for NetBIOS name information. | |
| nethogs | A net top tool which displays traffic used per process instead of per IP or interface | |
| netperf | Benchmarking tool for many different types of networking | |
| netselect | An ultrafast intelligent parallelizing binary-search implementation of ping | |
| netwatch | monitor network connections | |
| ngrep | A grep-like utility that allows you to search for network packets on an interface. | |
| nload | Monitors network traffic and bandwidth usage | |
| nmap | A network exploration tool and security/port scanner | |
| ntop | A network traffic probe that shows the network usage. | |
| rrdtool | Data logging and graphing application | |
| sarg | Squid Analysis Report Generator | |
| sniffit | very good packet sniffer for unix with ncurses interactive mode. | |
| snort | A lightweight network intrusion detection system. | |
| tcpdump | A tool for network monitoring and data acquisition | |
| tcpflow | Captures data transmitted as part of TCP connections then stores the data conveniently | |
| tcpreplay | Gives the ability to replay previously captured traffic in a libpcap format | |
| vnstat | A console-based network traffic monitor |