aquatone
A tool for domain flyovers
Impacket is a collection of Python classes for working with network protocols. It provides low-level programmatic access to the packets and for some protocols (e.g. SMB1-3 and MSRPC) the protocol implementation itself. Packets can be constructed from scratch, as well as parsed from raw data, and the object-oriented API makes it simple to work with deep hierarchies of protocols.
A tool for domain flyovers
Tcpdump is a command-line packet analyzer for capturing and analyzing network traffic.
Open source framework for network traffic analysis with advanced features.
A multi-tool for subdomain enumeration
Open source software for leveraging insights from flow and packet analysis to identify potential security threats or attacks.
A simpler version of a honeypot that looks for connections from external parties and performs a specific action, usually blacklisting.