Network monitoring typically consists of tracking a system's data traffic to help identify areas of congestion or to analyze equipment or application problems. Nagios and MRTG are useful, free monitoring utilities that operate with Linux and can be helpful to understand mixed-platform environments where UNIX family systems and Windows coexist. Progent's system integration experts can help you use each of these utilities to optimize and repair your infrastructure.

Nagios Network Monitoring Application
Nagios screenThe Nagios monitoring application is a host/service monitor that operates with Linux or a UNIX variant. The monitoring daemon runs periodic inspections of servers and services you specify using external add-ons which bring back status data to Nagios. When issues are detected, the daemon can send notifications to management personnel in a variety of ways such as e-mail, IM, or Short Message Service. Up to date status information, archival records, and analysis reports can be examined via a web browser.

Key features of Nagios include:

  • Tracking of system services such as POP3, HTTP, FTP, and PING
  • Tracking of host machines: CPU load, memory/disk utilization, running processes, etc.
  • Capability to specify network host ranking, allowing differentiation between hosts that are not running as opposed to ones that are not accessible
  • Contact alerts via email, pager, or other pre-specified means in case service or host problems occur or are resolved
  • Ability to specify event handlers to be run during service or machine events for automated problem remediation
  • Support for deploying redundant and dispersed monitoring servers
  • External command interface that allows on-the-fly edits to be defined for the tracking and alerting activity via the use of event handlers, the web GUI, and third-party software
  • Preservation of host and service state after application restarts
  • Planned offline periods for eliminating host and service alerts during deliberate outages
  • Web applet for viewing existing system state, notification and anomaly history, event logs, etc.
  • Permissions scheme that allows you to restrict what users can view and modify from the web interface

Multi Router Traffic Grapher (MRTG)
MRTG support servicesMRTG is a free tool to monitor the traffic load on a network. Running under Microsoft Windows or Linux, MRTG reads the traffic counters of network routers and creates web pages which provide an up-to-date visual depiction of this traffic.

MRTG permits you to graph the bandwidth in and out of any SNMP-enabled network appliance. This can represent servers, routers, and switches. You can use the displayed information to determine network trouble spots.

Type of information you are able to graph with MRTG include:

  • Bandwidth in and out in bits or bytes/sec
  • Connection rate in connections per second
  • Traffic through a particular VIP server or real server
  • Total number of concurrent sessions

Contact Progent about Network Monitoring Expertise
Progentís network monitoring specialists are experienced in operating a variety of network monitoring tools that can assist you to troubleshoot or optimize your network infrastructure. For network monitoring assistance, call Progent at 800-993-9400 or see Contact Progent.

Progent's Support for UNIX-family Environments
Progent's UNIX-family support experts offer small companies and software developers assistance with managing and servicing UNIX/Linux/OS X-based networks that can coexist with Microsoft environments. Progent offers your organization access to UNIX technical professionals, certified Microsoft engineers, Cisco CCIEs, and security experts accredited by CISSP. This broad array of knowledge gives your company a convenient one-stop source to help you to build and support a protected and reliable multi-vendor network and communications system that combines Windows with leading variants of UNIX including: Apple Mac OS X, Solaris, IBM AIX Open UNIX, HP-UX, BSD, SCO and Silicon Graphics IRIX (SGI/IRIX) or major Linux platforms including RedHat Linux, SUSE Linux, Debian GNU/Linux and CentOS Linux, Ubuntu, Mandriva Linux, PCLOS, fedora Linux, and Gentoo.
















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