Network monitoring typically entails tracking a network’s data traffic in order to identify bottlenecks or to troubleshoot equipment or software issues. Nagios and MRTG are useful, free monitoring utilities that run with Linux and can be used to understand mixed-platform environments where UNIX and Windows coexist. Progent's network support engineers can help you deploy each of these tools to tune and troubleshoot your network.
Nagios Open Source Monitoring System
The Nagios Open Source monitoring application is a host and service monitor that runs with Linux or a UNIX variant. The Nagios daemon runs intermittent checks on servers and services you specify by means of external plug-ins which bring back status data to Nagios. When issues are detected, the Nagios can send notifications to support contacts in a variety of ways such as email, IM, or SMS. Up to date status information, historical logs, and reports can be accessed via the web.
Key features of the Nagios monitor are:
- Monitoring of system services such as POP3, HTTP, SSH, and PING
- Tracking of host resources: CPU load, disk and memory utilization, log files, etc.
- Ability to specify host hierarchy, permitting differentiation between machines that are down vs. ones that are unreachable
- Support personnel alerts via e-mail, pager, or other pre-defined means when service or machine issues occur or are resolved
- Option to specify event handlers to be executed upon the detection of service or machine events for proactive problem resolution
- Support for implementing redundant and distributed network monitoring computers
- Outboard command option that enables ad hoc modifications to be defined for the tracking and alerting behavior via the use of event scripts, the web GUI, and third-party software
- Preservation of host and service status after program restarts
- Planned offline periods for eliminating host and service alerts when there are intentional service breaks
- Browser interface for viewing current network status, notification and problem history, log file, etc.
- Authorization scheme that permits you to limit what users can see and modify via the web interface
Multi Router Traffic Grapher (MRTG)
MRTG is an Open Source tool to monitor the traffic load on your network. Running under Microsoft Windows or Linux, MRTG reads the traffic counters of routers and generates web pages which provide an up-to-date visual depiction of this traffic.
Multi Router Traffic Grapher lets you graph the bandwidth through any SNMP-enabled network device. This can represent processors, routers, and switches. You can utilize the displayed data to determine network trouble spots.
Type of information you are able to graph with MRTG include:
- Traffic in bits or bytes/sec
- Connection rate in connections/sec
- Traffic through a specific Virtual server or real server
- Number of simultaneous sessions
Contact Progent for Network Monitoring Expertise
Progent’s network monitoring consultants are skilled in operating a number of network monitoring tools that can help you to repair or tune your network infrastructure. To get network monitoring consulting, call Progent at 800-993-9400 or see Contact Progent.
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