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Superscan is a tool used by system administrators, crackers and script kiddies to evaluate a computer's security. System administrators can use it to test for possible unauthorised open ports on their computer networks , whereas crackers use it to scan for insecure ports in order to gain illegal access to a system.
ShieldsUP is an online port scanning service created by Steve Gibson of Gibson Research Corporation.The purpose of the utility is to alert the users of any ports that have been opened through their firewalls or through their NAT routers, which can be used by malicious users to take advantage of security vulnerabilities.
(Port zero is not a usable port number.) Most services use one, or at most a limited range of, port numbers. Some port scanners scan only the most common port numbers, or ports most commonly associated with vulnerable services, on a given host. The result of a scan on a port is usually generalized into one of three categories:
netcat (often abbreviated to nc) is a computer networking utility for reading from and writing to network connections using TCP or UDP.The command is designed to be a dependable back-end that can be used directly or easily driven by other programs and scripts.
Fast scan (nmap -F [target]) – Performing a basic port scan for fast result. Host discovery – Identifying hosts on a network. For example, listing the hosts that respond to TCP and/or ICMP requests or have a particular port open. Port scanning – Enumerating the open ports on target hosts.
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Step 3 – The scanner checks for vulnerabilities. Step 4 – When vulnerabilities are detected, the results are categorized in several ways, allowing customers to target the data they find most useful. SAINT can group vulnerabilities according to severity, type, or count. It can also provide information about a particular host or group of hosts.
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