![]() ![]() Like in other Linux distributions, once the installation is completed, check the version of Nmap by entering: nmap version. This is an example of the output in CentOS 7. The -A (aggressive scan) option forces nmap to use operating system detection, version detection, script scanning, and traceroute detection. To install Nmap on an RHEL based Linux distribution type the following command: sudo yum install nmap. ![]() We can use nmap more aggressively to try to winkle more information out of the device. The device with IP Address 192.168.4.11 had an unknown manufacturer and a lot of ports open. RELATED: How to Turn a Raspberry Pi into a Low-Power Network Storage Device Unknown Device With Many Open Ports It uses Samba so that I can connect to it from any computer on my network. This makes sense I use that particular Pi as a sort of mini-Network Attached Storage device (NAS). SMB is a means of sharing folders and files across a network. The three types of responses are below: Open, Accepted: When ports are open, and you can access this system by them. Samba is a free software implementation of Microsoft’s Server Message Block protocol (SMB). How Does a Port Scanner Program Work This program sends a network request throw network and tries to connect to a specific TCP or UDP port on a computer and records the response.
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