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  2. Superscan - Wikipedia

    en.wikipedia.org/wiki/Superscan

    SuperScan is a free connect-based port scanning software designed to detect open TCP and UDP ports on a target computer, determine which services are running on those ports, and run queries such as whois, ping, ICMP traceroute, and Hostname lookups.

  3. ZMap (software) - Wikipedia

    en.wikipedia.org/wiki/ZMap_(software)

    ZMap is a free and open-source security scanner that was developed as a faster alternative to Nmap.ZMap was designed for information security research and can be used for both white hat and black hat purposes.

  4. ShieldsUP - Wikipedia

    en.wikipedia.org/wiki/Shieldsup

    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.

  5. netcat - Wikipedia

    en.wikipedia.org/wiki/Netcat

    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.

  6. Port scanner - Wikipedia

    en.wikipedia.org/wiki/Port_scanner

    (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:

  7. SAINT (software) - Wikipedia

    en.wikipedia.org/wiki/SAINT_(software)

    The SAINT scanner, screens every live system on a network for TCP and UDP services. For each service it finds running, it launches a set of probes designed to detect anything that could allow an attacker to gain unauthorized access, create a denial-of-service, or gain sensitive information about the network.

  8. AOL

    search.aol.com

    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

  9. Idle scan - Wikipedia

    en.wikipedia.org/wiki/Idle_scan

    An idle scan is a TCP port scan method for determining what services are open on a target computer [1] without leaving traces pointing back at oneself. This is accomplished by using packet spoofing to impersonate another computer (called a " zombie ") so that the target believes it's being accessed by the zombie.