AMaViS (A Mail Virus Scanner) scans e-mail attachments for viruses using third-party virus scanners available for UNIX environments. It resides on a UNIX (Linux) machine and looks through the attached files arriving via e-mail, generates reports when a virus is found and sets the delivery on hold.
bcnu is a Web-based system management tool which delivers information on the status of networked systems in a simple and easy-to-use manner. It uses a web browser to display information about hosts in a tabular form. Historical information can be held indefinitely, and there is a powerful query tool available to interrogate it. Client systems can run an agent which logs information back to a central system. An agent scheduler is integrated to allow agents to be run at different intervals. Standard agents include ftp, http, disk space, logfiles, processes, and more.
Firewall is a set of scripts (firewall, fwup, and fwdown) that implement an ipchains firewall and various forms of network address and port translation. All you have to do is read the policy file and edit it to reflect your topology and filtering policy. It supports many different types of network topology (single host, traditional forwarding, masquerading, port forwarding, alias port forwarding and NAT), up to 10 untrusted interfaces each with their own policy, and over 50 network applications. It also supports centralised administration of multiple remote firewalls (meta-firewall).
The ipaudit package records and displays network activity. It is useful for identifying heavy bandwidth users, intrusive telnet sessions, denial of service attacks, and scans. It includes ipaudit, which stores counts of bytes and packets for every combination of host/port pairs and protocol. The utilities total and ipstrings can be used to investigate network traffic records from the command line. ipaudit-web can collect network traffic statistics and generate Web reports.
isdn4net is a collection of scripts and configuration files to help you run isdn4linux. It is designed for fast setup of a simple dialout to one ISP, but may also be used for management of complex setups. It is intended for Mandrake systems, but if there is interest, it could be adapted to others as well.
Ledcontrol is a program that shows information on the normally-unused LEDs on your keyboard. You can configure it to show virtually any TRUE/FALSE condition or arbitrary value accessible. Features include blinking LEDs, priority levels, user-made animations, a GTK+ interface, etc. Ledcontrol works both in X and on a text console.
Heartbeat is a full-function high-availability system for Linux and other POSIX-like OSes. It monitors services and restarts them on errors. When managing a cluster (more than 1 machine), it will also monitor the members of the cluster and begin recovery of lost services in less than a second. It runs over serial ports and UDP broadcast/multicast, as well as OpenAIS multicast. It is easily adapted to different interconnect media and protocols. When used in a cluster, it can operate using shared disks, data replication, or no data sharing. Versions starting with 2.0 are comparable to any commercial HA package, providing resource monitoring, larger clusters, and detailed dependency information.
Mason is a tool that interactively builds a firewall using Linux' ipfwadm or ipchains firewalling. You leave mason running on the firewall machine while you are making all the kinds of connections that you want the firewall to support (and want it to block). Mason gives you a list of firewall rules that exactly allow and block those connections. It can either build a firewall from scratch for you or supplement an existing firewall.