Astaro Portscan Detection is a netfilter target which will attempt to detect TCP and UDP port scans and log them to syslog. This target is based upon Solar Designer's scanlogd. It suppports mutliple levels of logging, custom prefixes for entries, weighted total port scan detection, and port scan temporal spread detection.
Ettercap is a network sniffer/interceptor/logger for ethernet LANs. It supports active and passive dissection of many protocols (even ciphered ones, like SSH and HTTPS). Data injection in an established connection and filtering on the fly is also possible, keeping the connection synchronized. Many sniffing modes were implemented to give you a powerful and complete sniffing suite. Plugins are supported. It has the ability to check whether you are in a switched LAN or not, and to use OS fingerprints (active or passive) to let you know the geometry of the LAN.
This is a set of Linux drivers for the ACP modem (Mwave), a WinModem. It is composed of a loadable kernel module and a user level application. Together these components support direct attachment to public switched telephone networks (PSTNs) and support selected world wide countries. This driver provides support for the IBM ThinkPad 600E. The modem also supports the standard communications port interface (ttySx) and is compatible with the Hayes AT Command Set.
Butterfly is a timing system designed for environments in which time spent on the Internet is charged for. Using ipchains(8) firewalling software, the Butterfly daemon cooperates with a web-based administration interface and a client interface to control time spent browsing. The ISP Edition allows the creation of several 'sites' and provides detailed accounting information for all the sites included.
Firewall Builder consists of a GUI and set of policy compilers for various firewall platforms. It helps users maintain a database of objects and allows policy editing using simple drag-and-drop operations. The GUI and policy compilers are completely independent, which provides for a consistent abstract model and the same GUI for different firewall platforms. It currently supports iptables, ipfilter, ipfw, OpenBSD pf, Cisco PIX and FWSM, and Cisco routers access lists.
fwmon is a firewall monitor for Linux. It integrates with ipchains/iptables to give you realtime notification of firewall events. It has fairly customizable output, allowing you to display a packet summary with hex and ASCII data dumps to stdout, a logfile, tcpdump-style capture files, and even syslog. It also boasts some simple security features such as the ability to chroot itself, and operate in a non-root environment.
ferm is a tool to maintain and setup complicated firewall rules. It allows one to reduce the tedious task of carefully inserting rules and chains, thus enabling the firewall administrator to spend more time on developing good rules, and less time on the proper implementation of those rules. These rules will be executed by the preferred kernel interface, such as ipchains and iptables, and in one pass. Firewall rules can also be split into different files and loaded at will.
Angst is an active sniffer, based on libpcap and libnet. It dumps into a file the payload of all the TCP packets received on the specified ports. It implements two methods for active sniffing. Angst is able to monitor ARP requests, and after enabling IP forwarding on the local host, it sends ARP replies mapping all IPs to the local MAC address. Also, it can flood the local network with random MAC addresses (like macof), causing switches to send packets to all ports.