Networking

• iplog
  iplog is a TCP/IP traffic logger. Currently, it is capable of logging TCP, UDP, and ICMP traffic. iplog is able to detect TCP port scans, TCP null scans, FIN scans, UDP and ICMP "smurf" attacks, bogu...
  
• Statistical Traffic Analysis Kit
  Statistical Traffic Analysis Kit is a set of command-line traffic analysis tools, designed to help a network administrator to see what is happening at a router at the moment. ...
  
• etherdump
  etherdump is an extremely small packet sniffer. ...
  
• Simple Python Blogger
  Simple Python Blogger is a small Python script to handle entries, users, sessions, and comments of a blog. ...
  
• Network Time Tools
  Network Time Tools (NTT) is a set of network tools designed to provide monitoring of a network and the services on that network, and provide various reports on the hosts/services and optional alerts ...
  
• OSSP flow2rrd
  OSSP flow2rrd is a companion tool to the Flow-Tools toolkit for storing NetFlow network traffic data in an accumulating fixed-size RRDTool round-robin database (RRD) for visualization purposes. ...
  
• snortalog
  A powerful script that summarizes and analyzes Snort logs. ...
  
• Interactive Bandwidth Monitor
  Ibmonitor is an interactive Linux console application which shows bandwidth consumed and total data transferred on all interfaces. ...
  
• Promisc
  Promisc is a sniffer based on the AF_PACKET domain socket. It parses the IP, TCP, UDP, ICMP, and ARP protocols. A GTK graphical user interface has been written in order to simplify its use. ...
  
• Spong
  Spong is a simple system-monitoring package. It features client-based monitoring (CPU, disk, processes, logs, etc.), monitoring of network services, grouping of hosts (routers, servers, workstations,...
  
• arpwatch NG
  The arpwatch NG package contains arpwatch and arpsnmp. Both utilities monitor Ethernet or FDDI network traffic and build databases of Ethernet/IP address pairs, and can report certain changes. ...
  
• kwatch
  This utility is a port of kwatch 0.3 by Ralph C. Weichert to KDE2/3. Basically it is a tail -f with a graphical KDE user interface for watching log files. Release 2.2 adds support for some basic hand...
  
• N-View
  N-View is a network monitor for small and medium-sized networks. It features automatic scanning of subnets for host addresses, monitoring of ICMP responses from all hosts and many other. ...
  
• MRTG-eth-probe
  MRTG-eth-probe provides a probe for the Multi Router Traffic Grapher, generating statistics for network devices that do not support the SNMP protocol. It reads interface stats from /proc/net/dev (or ...
  
• XNetworkStrength
  Shows what my signal strength is on a wireless network card. ...
  
• PChar
  pchar is a tool to characterize the bandwidth, latency, and loss of links along an end-to-end path through the Internet. It is based on the algorithms of the pathchar utility written by Van Jacobso...
  
• BW ACCT
  BW Acct is a bandwidth accounting and reporting application. It is implemented as a C daemon which manages accounting rules in an iptables/netfilter firewall on the Linux 2.4 kernel. ...
  
• pmacct-contribs
  pmacct-contribs consists of a few scripts: a 'showTraffic' tool that generates traffic reports reading data previously inserted by pmacct into a MySQL DB, and a 'weblog' tool that displays traffic da...
  
• Bandwidth Monitor NG
  Bandwidth Monitor NG is a small and simple console-based live bandwidth monitor. ...
  
• Very Simple Interface Monitoring Daemon
  Vsimd stands for Very Simple Interface Monitoring Daemon. Vsimd's goal is to provide a simple ICMP-ECHO-based infrastructure on top of which monitoring tools can be built. Vsimd periodicaly sends ICM...
  
• Flow Loader And Virtual Information Output
  F.L.A.V.I.O. is a data grapher for netflow collectors. It gathers data from a netflow collector, loads it into a MySQL database and can generate daily, weekly, monthly, and yearly charts. ...
  
• EthGraph
  EthGraph is a graphical network device traffic monitor based on Qt. ...
  
• cflowd
  cflowd is a flow analysis tool currently used for analyzing Cisco's NetFlow enabled switching method. ...
  
• KNemo
  KNemo - the KDE Network Monitor ...
  
• AIM Sniff
  AIM Sniff is a utility for monitoring and archiving AOL Instant Messenger messages across a network. ...