1. Free Hacking Tools for PenetrationTesting

2. Penetration Testing is also known as Pen Testing. Pen testing is the type of testing a web application, computer system, Network to find vulnerabilities that an attacker could exploit. It is a practical and accredited way to check the security of an IT infrastructure. By securely trying to exploit application sensitivities which include Operating system service and application blemishes, inappropriate configurations, and also perilous end-user behavior. This type of evaluations is also helpful in authenticating the efficiency of defensive ways and also end-users’ adherence to security strategies. Information about any security susceptibilities collected using Penetration testing need to be characteristically combined and presented network systems managers to perform remedial measures.

3. Types Of Penetration Testing To Know Internal Testing -  The aim here is to simulate what would happen if a company's own employee attempted to carry out an attack from within. Although various companies concern themselves with outside threats, many breaches occur because of someone inside the penetration testing service provideritself. Internal testing can help businesses recognize weaknesses in their second or third lines of defense, as an insider attack will bypass perimeter safeguards altogether.

4. External Testing -  External testing is perhaps the very used form of penetration testing. Here, QA experts probe application security as an external threat might, finding vulnerabilities in everything from firewall protection to domain name servers. 

5. Double-blind Testing -  The advantage of double-blind testing is that it usually catches development teams and IT staff by surprise. In various other instances of penetration testing, everybody involved in the software project is aware that the app's security is going to be probed. That's not the case here. True double-blind testing includes notifying only the bare minimum number of people before being carried out. This way, QA teams can determine how the penetration testing service provider and software will actually react in the event of a breach attempt.

6. Some Tools That Are Available For Free Online That We Highly Recommend: Kismet Category: Packet Sniffer With expanding instances of wireless LAN hacking, Kismet has become a powerful tool for identifying intrusion and packet sniffing on the 802.11 a/b/g family of WLAN that supports raw monitoring (rfmon) mode.   Aircrack-ng Category: Password Cracking Aircrack-ng is a suite of wireless password cracking tools for the 802.11a/b/g group of wireless networks that supports raw monitoring (rfmon) mode. It captures network traffic in monitor mode and once sufficient data is captured it runs cracking algorithms to improve WEP and WPA keys. 

7. OpenVAS Category: Vulnerability Scanner OpenVAS is a vulnerability scanner that was forked from the last free version of Nessus after that tool went proprietary in 2005. The free version of Nessus today only works in non-enterprise environments. For security audit purposes, Nessus remains a popular vulnerability scanner, however, program scans now require a license fee of about $3,000 a year.

8. Metasploit Category: Vulnerability Exploitation Framework The Metasploit framework implements a series of tools to perform penetration testing on a system. This multi-uses hacking framework is widely applied by pen testers to unearth vulnerabilities on different platforms, collect information on the existing vulnerabilities, and retest the remediation defenses in place.  Fiddler Category: Proxy Server Application Fiddler is a freeware web proxy tool that is browser and platform agnostic. It has several features that can help a pen tester. It allows users to debug web traffic from any system (works with almost all operating systems on PCs), smartphone, or tablet.