Setting up a static ip address is useful for a lot of things, especially if you run a web server for example and don’t want to change the port forwarding rules on your router each time it allocates a different ip to your computer.
Only use this guide if you already know the working network configuration (ip, mask, gateway and dns servers).
There are a lot (and i mean, A LOT) of tools you can use to see what’s happening on a computer’s network. However, netstat allows you to gather some quick info about the network connections, on the spot. The most common set of options is ‘-atpn‘.
Nmap (Network Mapper) is a security scanner used to discover hosts and services on a computer network, thus creating a “map” of the network. To accomplish its goal, Nmap sends specially crafted packets to the target host and then analyzes the responses.
The software provides a number of features for probing computer networks, including host discovery and service and operating system detection. These features are extensible by scripts that provide more advanced service detection, vulnerability detection, and other features. Nmap is also capable of adapting to network conditions including latency and congestion during a scan.