Network monitoring typically consists of tracking a networkís data traffic to help determine bottlenecks or to analyze hardware or software problems. Nagios and MRTG are powerful, no-cost monitoring utilities that run under Linux and can be used to understand mixed-platform environments where UNIX and MS Windows coexist. Progent's network support engineers can show you how to use both these products to optimize and repair your infrastructure.

Nagios Monitoring System
Nagios screenThe Nagios monitoring system is a host/service monitor that runs with Linux or a UNIX variant. The monitoring daemon executes intermittent inspections of servers and services you request using outside add-ons which bring back status data to Nagios. When problems are encountered, the Nagios can generate alerts to management contacts in a number of ways such as e-mail, IM, or Short Message Service. Current status information, archival records, and reports can be examined via a web browser.

Key capabilities of Nagios include:

  • Monitoring of network services such as POP3, HTTP, FTP, and NNTP
  • Tracking of host machines: processor load, memory/disk utilization, log files, etc.
  • Capability to define host hierarchy, permitting distinction between machines that are not running as opposed to hosts that are unreachable
  • Contact alerts via e-mail, pager, or other user-specified method when service or machine issues occur or are fixed
  • Option to define event handlers to be run during service or host events for proactive problem resolution
  • Accommodation for deploying backup and dispersed monitoring computers
  • External command option that enables on-the-fly edits to be made to the tracking and alerting behavior through the use of event scripts, the web GUI, and independent applications
  • Retention of machine and service status after program restarts
  • Scheduled offline periods for eliminating machine and service notifications when there are deliberate service breaks
  • Browser interface for examining current network status, notification and anomaly history, event logs, etc.
  • Permissions protocol that allows you to restrict what customers can see and modify via the web interface

Multi Router Traffic Grapher (MRTG)
MRTG support helpMRTG is a free utility to monitor the bandwidth utilization on your network. Running under Microsoft Windows or Linux and most UNIX platforms, MRTG reads the traffic counters of network routers and produces web-accessible graphs which provide an up-to-date visual representation of this data.

Multi Router Traffic Grapher allows you to track the traffic in and out of any SNMP network device. This can represent processors, routers, and switches. You can utilize the displayed data to determine system trouble spots.

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

  • Bandwidth in and out in bits or bytes/sec
  • Connection rate in connections/sec
  • Throughput in an out of a specific VIP/virtual server or node server
  • Total number of simultaneous sessions

Contact Progent for Network Monitoring Consulting
Progentís network monitoring consultants are skilled in operating a variety of utilities that can assist you to troubleshoot or optimize your connectivity infrastructure. To get network monitoring assistance, phone Progent at 800-993-9400 or see Contact Progent.

Progent's Consulting Services for UNIX-family Environments
Progent's UNIX-family support experts provide small businesses and product developers assistance with managing and supporting UNIX/Linux/OS X-based networks that may operate alongside Microsoft environments. Progent offers your organization the services of UNIX support professionals, certified Microsoft consultants, Cisco CCIEs, and security experts certified by CISM. This wide range of knowledge offers you a readily available single source to help your business to build and manage a safe and robust cross-platform network and communications infrastructure that incorporates Microsoft Windows with popular versions of UNIX including: Mac OS X, Solaris, IBM AIX Open UNIX, HP-UX (Hewlett Packard UNIX), Berkeley UNIX (BSD), SCO and Silicon Graphics IRIX (SGI/IRIX) or important Linux versions such as RedHat Linux, SUSE Linux, Debian GNU/Linux and CentOS Linux, Ubuntu Linux, Mandriva, PCLlinuxOS Linux, fedora, and Gentoo.

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