Network monitoring typically consists of tracking a system's bandwidth usage in order to identify areas of congestion or to troubleshoot equipment or application issues. Nagios and MRTG are useful, free monitoring utilities that operate under Linux and can be helpful to understand multi-vendor networks where UNIX family systems and MS Windows coexist. Progent's IT integration consultants can show you how to use both these tools to tune and repair your infrastructure.

Nagios Open Source Monitoring System
Nagios screenThe Nagios Open Source monitoring application is a host/service monitor that operates with Linux or a UNIX variant. The monitoring daemon executes intermittent inspections of servers and services you specify by means of external add-ons which bring back status information to Nagios. When problems are encountered, the Nagios can generate notifications to management personnel in a number of ways such as e-mail, IM, or SMS. Up to date status information, historical records, and analysis reports can be examined via the web.

Major features of Nagios are:

  • Tracking of network services such as POP3, HTTP, SSH, and PING
  • Monitoring of host resources: processor load, memory/disk utilization, running processes, etc.
  • Capability to define host ranking, permitting differentiation between machines that are not running as opposed to hosts that are unreachable
  • Support personnel notifications via e-mail, pager, or other pre-specified means when service or machine issues occur or get resolved
  • Ability to specify scripts to be executed upon the detection of service or host events for proactive problem resolution
  • Accommodation for implementing backup and distributed monitoring computers
  • External command option that allows on-the-fly edits to be defined for the monitoring and alerting behavior through the utilization of event scripts, the web interface, and third-party software
  • Retention of host and service state across application restarts
  • Scheduled downtime for suppressing host and service notifications when there are intentional service breaks
  • Browser applet for viewing current network status, alert and problem archive, event logs, etc.
  • Permissions protocol that allows you to limit what users can see and modify via the web interface

MRTG
MRTG consulting helpMRTG Graphical Traffic Load Monitor is an Open Source utility to track the bandwidth utilization on a network. Running under Microsoft Windows or Linux and most UNIX platforms, MRTG reads the traffic counters of routers and produces web pages which offer a live intuitive representation of this traffic.

MRTG allows you to track the traffic in and out of any SNMP-enabled network device. This includes servers, routers, and switches. Administrators can use the resulting information to determine system trouble spots.

Data you can depict with MRTG include:

  • Bandwidth in and out in bits or bytes/sec
  • Connection rate in connections per second
  • Bandwidth through a specific VIP/virtual server or node server
  • Number of simultaneous sessions

Contact Progent for Network Monitoring Expertise
Progentís network monitoring consultants are skilled in using a variety of network monitoring tools that can assist you to repair or optimize your network infrastructure. To get network monitoring help, call Progent at 800-993-9400 or go to Contact Progent.

Progent's Microsoft, Cisco, and Applications Consulting Expertise
Progent's Microsoft and Cisco certified professionals offer customers in San Francisco, Silicon Valley, and in cities throughout the U.S a broad range of knowledge concerning the basic IT requirements shared by typical small business environments. Progent's primary services include system integration, Microsoft Exchange consulting, network security consulting and Help Desk consulting and staffing. Progent's Application Experts Group offers in-depth expertise in key application topics. By offering a one-stop resource for IT generalists and specialists, Progent is able to deliver fast, affordable and comprehensive network solutions that address the unique requirements of your company.

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