mrouted is an implementation of the DVMRP multicast routing protocol. It turns a UNIX workstation into a DVMRP multicast router with tunnel support, in order to cross non-multicast-aware routers.

Mailfromd is a general-purpose mail filtering daemon for Sendmail and Postfix. It is able to filter both incoming and outgoing messages using criteria of arbitrary complexity, supplied by the administrator in the form of a script file. The daemon interfaces with the MTA using Milter protocol.

The program name -- mailfromd -- stems from the fact that the original implementation was a simple filter implementing the sender address verification technique. Since then the program has changed dramatically, and now it is actually a specialized system providing a set of interfacing functions, along with a language translator and runtime evaluator for executing user-defined filter programs.

Netdisco is a network management application targeted at large corporate and university networks. Data is collected into a Postgres database using SNMP and presented with a clean web interface using Mason.

Designed for moderate to large networks, configuration information and connection data for network devices are retrieved by SNMP. With Netdisco you can locate the switch port of an end-user system by IP or MAC address. Data is stored using a SQL database for scalability and speed. Layer-2 topology protocols such as CDP (Cisco Discovery Protocol) optionally provides automatic discovery of the network topology.

Zenoss Core is an enterprise-grade network and systems monitoring product that delivers the functionality IT operations teams need to effectively manage the health and performance of their entire infrastructure through a single, integrated package.

For far too long, robust IT infrastructure monitoring was out of reach for most organizations because of the cost and complexity of the proprietary systems that offered the required functionality. Zenoss has changed the game by offering a complete, easy-to-use solution as a free (i.e. no money), downloadable, open source software product.

Inventory & Configuration

This tool is a command-line interface for testing SMTP servers. It supports many protocol options and connection methods, including: plaintext SMTP, SMTP with SSL on connect (the deprecated method many clients use on port 465), STARTTLS after session start, SMTP AUTH with basic authentication or MD5-based methods, and more with good debugging output to help diagnose problems that can be difficult to find using most full-featured e-mail clients that lack good feedback on the outgoing process.