GRC port scan shows open ports Sorry if this has been asked a hundred times before.. I did a port scan at grc and it shows ports 21/FTP, 22/SSH, 23/Telnet and 443/https as being open.

Nov 27, 2015 Port Scanner - Scan Network Ports - WhatIsMyIP.com® The port scanner tool will provide you with information regarding valid methods of connecting to a network. Scan your network for open ports and determine if those open ports need to be closed to provide more network security and less vulnerabilities. Online Port Scanner with Nmap - Discover open TCP ports Nmap is a very effective port scanner, known as the de-facto tool for finding open ports and services. Nmap performs several phases in order to achieve its purpose: 1. Nmap host discovery The first phase of a port scan is host discovery. Here the scanner attempts to check if the target host is live before actually probing for open ports. Get Network Port Scanner - Microsoft Store There are better Network scanners in the Windows Store. This particular app is very limited in functionality and scans very slowly (especially if you choose to scan an entire network). You cannot scan 1 IP address as the app only supports ranges. It also requires you to fill in a custom port range, which can make the scans slower.

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Linux and Unix Port Scanning With netcat [nc] Command Nov 27, 2015 Port Scanner - Scan Network Ports - WhatIsMyIP.com®