Freeware has long reigned as a go-to tool for network managers. Applications such as, Multi Router Traffic Grapher () and provide an inexpensive means to monitor devices, traffic and security in even the largest networks. More recently, freeware’s community-supported cousins -- open source applications -- have emerged to tackle many network-monitoring tasks at no cost to their owners.

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Such projects as and open source products from commercial vendors, and have been gaining ground in enterprise IT shops. Here, a few network managers in the know share their latest free finds: 1. Network managers tracking down unauthorized IP addresses on their networks should check out this developed by a member of Princeton University’s IT team. DHCP_probe “attempts to discover and BootP servers on a directly attached Ethernet network,” according to its creator, Irwin Tillman of the Network Systems Group at Princeton University’s Office of Information Technology. Logitech formula vibration feedback wheel driver windows 7. The application sends out requests to DHCP servers on a network, and if a nonauthorized server answers the requests, the software will alert IT staff to the server’s existence. Rick Beebe, manager of system and network engineering for ITS-Med, says the application addresses “a regular problem” at the Yale University School of Medicine in New Haven, Conn. “Someone will bring a Linksys or Netgear wireless access point or an Apple AirPort in and put it on the network, so they can have wireless in the office.

Only they plug it in backward and start sending IP addresses to a large part of the network,” Beebe says. “Usually [devices that] get those IP addresses appear broken, because the IPs aren't actually usable, or someone attempting to share files on their machine checks the box that says ‘share my Internet’ connection, [which produces] the same result.” [ ] Last updated in 2004, DHCP probe was first developed to run on Solaris and was ported to also run on. Beebe finds its function useful, but says he is surprised it hasn’t been updated to be less version-dependent and easier to deploy -- considering the problem it solves.

“I find it hard to believe that we’re the only ones with this problem so I’m surprised there hasn’t been more development of it,” he says. For Craig Bush, managing and securing passwords got a lot easier when he downloaded Password Safe, an originally developed by technologist and author Bruce Schneier. Bush, network administrator at Exactech in Gainesville, Fla., says he regularly browses for applications that might address a nagging problem on his network. The fact that Password Safe has evolved to an open source project especially appeals to Bush. “I use the one-off [freeware] apps when I need them, but I’d much rather use an application that has a good support community behind it,” he says. For its part, Password Safe was last updated in mid-February, currently in Version 3.0.6, and it allows users to keep their passwords securely encrypted on their computers.

The passwords can be unlocked with a single combination. The free Windows utility uses the, a free alternative to Data Encryption Standard () and features an intuitive interface that lets users set up their password. This free tool makes collecting Syslog entries from multiple devices easier for James Kritcher, vice president of IT at White Electronic Designs in Phoenix. The freeware (a licensed version with more features is also available) “receives, filters, logs, displays and forwards Syslog messages and traps from such hosts as, switches, systems and other Syslog-enabled devices,” according to its keeper, Kiwi Enterprises. Kritcher says the software features a “nice GUI for managing entries” and provides trending information. The software can also perform SNMP trap and parsing, and DNS caching of as many as 100 entries to enable fast lookups, the company says.

Exodus full discography torrent. “It is a great application that consolidates log entries from any Syslog-enabled devices. We use it to manage and monitor network devices such as routers and PIX,” he says. For fans of such products as or, Argus represents a no-cost alternative. The software application monitors systems, and routers to keep IT managers up-to-date on potential performance and availability problems.

Longtime Argus user Kerry Miller, network engineer at First Victoria National Bank in Victoria, Texas, says now he is updating his deployment to also monitor the gear supporting advanced IP applications, such as. “We are still using Argus to monitor our systems, and we’ve been expanding it to and VoIP equipment at several new locations,” he says.