Network monitoring conventionally entails tracking a network’s bandwidth usage in order to determine choke points or to troubleshoot hardware or application issues. Nagios and MRTG are powerful, free monitoring tools that run with Linux and can be helpful to monitor mixed-platform environments where UNIX family systems and MS Windows coexist. Progent's network support experts can help you use each of these utilities to tune and troubleshoot your network.
Nagios Network Monitoring System
The Nagios Open Source monitoring application is a host and service monitor that operates under Linux or a UNIX variant. The monitoring daemon executes intermittent inspections of hosts and services you specify using outside add-ons which bring back status data to Nagios. When issues are detected, the daemon can send alerts to administrative personnel in a variety of ways such as email, IM, or Short Message Service. Current status information, historical logs, and analysis reports can be examined using a web browser.
Key capabilities of the Nagios monitor are:
- Tracking of system services such as SMTP, HTTP, FTP, and PING
- Monitoring of host resources: CPU load, disk and memory utilization, log files, etc.
- Ability to specify network host hierarchy, permitting differentiation between machines that are not running vs. hosts that are not accessible
- Contact notifications via email, pager, or other pre-defined method in case service or machine issues occur or are resolved
- Option to specify scripts to be executed during service or machine events for proactive problem resolution
- Accommodation for deploying redundant and distributed monitoring servers
- External command interface that enables on-the-fly modifications to be defined for the monitoring and notification behavior through the utilization of event handlers, the web GUI, and independent software
- Preservation of host and service state after program restarts
- Planned offline periods for eliminating host and service alerts during intentional service breaks
- Web applet for examining current network status, alert and problem history, event logs, etc.
- Authorization protocol that enables you to limit what users can view and modify via the web interface
MRTG Graphical Traffic Load Monitor
MRTG is a free utility to track the bandwidth utilization on your network. Powered by Windows or Linux, MRTG captures data from the traffic counters of network routers and creates web-accessible graphs which provide an up-to-date visual representation of this data.
Multi Router Traffic Grapher lets you track the bandwidth through any SNMP network device. This includes processors, routers, and switches. Administrators can utilize the resulting information to determine network bottlenecks.
Data you can graph with MRTG include:
- Throughput in bits or bytes/sec
- Connection rate in connections/sec
- Bandwidth in an out of a specific VIP/virtual server or node server
- Number of simultaneous sessions
Ask Progent for Network Monitoring Expertise
Progent’s network monitoring consultants are skilled in using a variety of tools that can help you to repair or optimize your connectivity infrastructure. For network monitoring expertise, phone Progent at 800-993-9400 or refer to Contact Progent.
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