Nmap - the Network Mapper. Github mirror of official SVN repository.
ZMap is a fast single packet network scanner designed for Internet-wide network surveys.
Penetration tests on SSH servers using brute force or dictionary attacks. Written in C.
Faster and more efficient stateless SYN scanner and banner grabber due to userland TCP/IP stack usage.
NESCA 4 - multi-threaded port scanner, with nmap accuracy. With password brute force almost everything, and network tester.
Hawkeyes is a lightweight and efficient port scanner designed for network diagnostics.
Reliable multithreaded TCP port scanner.
A simple port scanner made for learning purpose which appear to have possibilities of great capabilities.
A port scanner project I completed for my Operating Systems class to apply concurrency in the C language.
A network utility that has several features.
k1t is a network utility, that contains several tools, including a packet-sniffer. To use the packet-sniffer, make sure you're root.
Mass IPv4/port scanner
A simple TCP/IP port scanner using raw sockets in C
ScanX is a Light-weight TCP Port Scanner. It attempts to connect to a list of ports on a specified host to check which ports are open.
A command-line port scanner using raw SYN packets
Simple SYN TCP scanner that uses unix sockets
A simple port scanner built using clang
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