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• smtp

Airhook Airhook is a reliable data delivery protocol, like TCP. Unlike TCP, Airhook gracefully handles intermittent, unreliable, or delayed networks. Other features include session recovery, queue control, and delivery status notification. Airhook is useful for keeping connections running over bad wireless networks (like CDPD), intermittent dial-up connections, and any other network that doesn't work very well. The implementation includes a TCP proxy (so you can use HTTP, SSH, etc.) and a protocol library for applications that want more control (real-time media delivery, games, etc).

Net-snmp 'net-snmp' provides tools and libraries relating to the Simple Network Management Protocol. The package includes an extensible agent, an SNMP library, tools to request or set information from SNMP agents, tools to generate and handle SNMP traps, and more.

POPauthd POPauthd is a Perl-based daemon that uses POP to authorize connecting hosts for SMTP relaying. It is particularly useful to authenticate roaming users with IP addresses that change often. The daemon runs in the background, watching the syslog for successful POP logins. When it sees one, it enters the IP in sendmail's access database, giving the host authorization to relay through the server. The entries can be expired after a prescribed, configurable period of time with a companion script run via crontab. 'POPauthd' is designed to run on a FreeBSD server, but should work properly on any UNIX system. It will work with any POP3 daemon that's capable of writing successful POP logins to a log file.

ROHC The ROHC library implements the RObust Header Compression (ROHC) protocol as defined by the IETF. The ROHC protocol define a standardized method for compressing IPv4, IPv6, UDP, UDP-Lite and RTP network packet headers. It performs well over links where the packet loss rate is high, such as wireless links.

Sctplib The 'sctplib' library is a fairly complete prototype implementation of the Stream Control Transmission Protocol (SCTP), a message-oriented transport protocol that supports multi-homing and multiple message streams multiplexed within an SCTP connection. The API of the library was modeled after section 10 of RFC 2960; most parameters and functions should be self-explanatory to the user familiar with this document. The library also provides various helper functions for managing timers and UDP communication.

Sredird Sredird is a serial port redirector that is compliant with the RFC 2217 "Telnet Com Port Control Option" protocol, which lets you share a serial port through the network.

Thy Thy is a lightweight HTTP daemon that is designed to be clean and fast, yet powerful enough to serve many hits a day. Despite its small size, it supports CGI, IPv6, SSL/TLS, and on-the-fly compression.

Udpcast UDPCast allows for the sending of data simultaneously to many destinations on a local net. This can for instance be used to install an entire classroom's PCs at once. The advantage over using other methods (nfs, ftp, whatever) is that udpcast uses Ethernet's multicast abilities: it won't take longer to install 15 machines than it would to install 2. The tool comes with a busybox bootdisk for easy loading of the tool. However, udpcast can also be started from the command line of an already installed system, and can be used for purposes other than just system installation.