Interface Traffic Indicator enables you to measure incoming and outgoing traffic for SNMP-capable (MIB-2) interfaces, including compatible network cards, switches, routers, and other devices. You can customize the polling interval from 1-120 seconds, and optionally write a log file. The current traffic is displayed in a bytes or bit/sec graph display.
Nmap - Free Security Scanner For Network Exploration & Security
Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime. Nmap uses raw IP packets in novel ways to determine what hosts are available on the network, what services (application name and version) those hosts are offering, what operating systems (and OS versions) they are running, what type of packet filters/firewalls are in use, and dozens of other characteristics. It was designed to rapidly scan large networks, but works fine against single hosts. Nmap runs on all major computer operating systems, and both console and graphical versions are available.
NETWORKING
