Aptness

  A Complete Guide to Nmap  Nmap Scan Types TCP SCAN. A TCP scan is generally used to check and complete a three-way handshake between you and a chosen target system. ... UDP SCAN. ... SYN SCAN. ... ACK SCAN. ... FIN SCAN. ... NULL SCAN. ... XMAS SCAN. ... RPC SCAN. Nmap is one of the most commonly used tools by  ethical hackers . Its ease of use and clean installation along with powerful scanning options, adds to its popularity. This nmap tutorial gives you a comprehensive understanding of the tool and teaches you how to perform advanced scans by yourself. Below is the list of topics that I’ll be covering through the course of this nmap tutorial.  What is Nmap? Nmap Scan Types Nmap Command List You can go through this Nmap Tutorial lecture where our  Training expert   is discussing each & every nitty-gritty of the technology. What is Nmap? Nmap , short for Network Mapper, is a network discovery and security auditing tool. It is known for...

  In the world of computer firewall protection,  a firewall refers to a network device which blocks certain kinds of network traffic, forming a barrier between a trusted and an untrusted network . It is analogous to a physical firewall in the sense that firewall security attempts to block the spread of computer attacks. Firewall History Firewalls have existed since the late 1980’s and started out as packet filters, which were networks set up to examine packets, or bytes, transferred between computers. Though packet filtering firewalls are still in use today, firewalls have come a long way as technology has developed throughout the decades. Gen 1 Virus Generation 1, Late 1980’s, virus attacks on stand-alone PC’s affected all businesses and drove anti-virus products. Gen 2 Networks Generation 2, Mid 1990’s, attacks from the internet affected all business and drove creation of the firewall. Gen 3 Applications Generation 3, Early 2000’s, exploiting vulnerabilities in applications ...