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Braa is a tool for making SNMP queries. It is able to query hundreds or thousands of hosts simultaneously, while being completely single-threaded. It does not need any SNMP libraries, as it is equipped with its own SNMP engine. However, it's good to have a complete SNMP package including "snmptranslate" installed somewhere, because for speed reasons, there is no ASN.1 parser in Braa, and all the SNMP OIDs need to be specified numerically.

Disco is a passive IP discovery and fingerprinting utility designed to sit on segments distributed throughout a network to discover unique IP's on the network. In addition to IP discovery disco has the ability to passively fingerprint TCP SYN packets. The intention is for disco to discover IP's on the network, fingerprint the packet if necessary, and load into the Gherkin Scan Manager database for targeted host scans.

EtherApe is a graphical network monitor for Unix modeled after Etherman. Featuring link layer, IP and TCP modes, it displays network activity graphically. Hosts and links change in size with traffic. Color coded protocols display. It supports Ethernet, FDDI, Token Ring, ISDN, PPP, SLIP, and WLAN devices, plus several encapsulation formats. It can filter traffic to be shown, and can read packets from a file as well as live from the network. Node statistics can be exported.

YANG is a data modeling language for NETCONF (RFC4741), developed by the IETF NETMOD WG. pyang is a YANG validator, transformator and code generator, written in python. It can be used to validate YANG modules for correctness, to transform YANG modules into other formats, and to generate code from the modules. pyang is compatible with http://www.ietf.org/internet-drafts/draft-ietf-netmod-yang-02.txt.

iftop listens to network traffic on a named interface, or on the first interface it can find which looks like an external interface if none is specified, and displays a table of current bandwidth usage by pairs of hosts. iftop must be run with sufficient permissions to monitor all network traffic on the interface; see pcap(3) for more information, but on most systems this means that it must be run as root.

The Multi Router Traffic Grapher (MRTG) is a tool to monitor the traffic load on network-links. MRTG generates HTML pages containing PNG images which provide a LIVE visual representation of this traffic. Check for an example. MRTG is based on Perl and C and works under UNIX and Windows NT. MRTG is being successfully used on many sites around the net. Check the MRTG-Site-Map, which is at: http://ee-staff.ethz.ch/~oetiker/webtools/mrtg/users.html

Cactid is a poller for Cacti that primarily strives to be as fast as possible. For this reason it is written in native C, makes use of POSIX threads, and is linked directly against the net-snmp library for minmumal SNMP polling overhead. Cactid is a replacement for the default cmd.php poller so you must decide if using Cactid makes sense for your installation.

nrpe is used to execute Nagios plugins on remote hosts and report the results to the main Nagios server. From the Nagios homepage: Allows you to execute "local" plugins (like check_disk, check_procs, etc.) on remote hosts. The check_nrpe plugin is called from Nagios and actually makes the plugin requests to the remote host. Requires that nrpe be running on the remote host (either as a standalone daemon or as a service under inetd).

The Net::SNMP module implements an object oriented interface to the Simple Network Management Protocol. Perl applications can use the module to retrieve or update information on a remote host using the SNMP protocol. The module supports SNMP version-1, SNMP version-2c (Community-Based SNMPv2), and SNMP version-3. The Net::SNMP module assumes that the user has a basic understanding of the Simple Network Management Protocol and related network management concepts.

rtGui is a web based front end for rTorrent - a command line BitTorrent client. It's written in PHP and uses XML-RPC to communicate with the rTorrent client. Features * List all torrent downloads or by * started/stopped/complete/incomplete/seeding status. * Sort view by any of the displayed columns. * View detailed torrent information. * Stop/start/hash-check torrent. * Set upload/download speed cap. * Add torrents by URL. * Does not require mySQL or any other database. * Set priority per torrent or file.