Network monitoring conventionally entails observing a system's data traffic to help determine bottlenecks or to troubleshoot hardware or application issues. Nagios and MRTG are powerful, Open Source monitoring tools that operate under Linux and can be used to monitor mixed-vendor environments where UNIX family systems and MS Windows coexist. Progent's network support engineers can help you use both these products to optimize and troubleshoot your network.
Nagios Monitoring System
The Nagios Open Source monitoring application is a host/service monitor that operates under Linux. The monitoring daemon executes periodic checks on servers and services you specify by means of outside plug-ins which bring back status information to Nagios. When issues are encountered, the daemon can generate alerts to management personnel in a number of ways such as email, instant messaging, or SMS. Up to date status data, historical records, and analysis reports can be examined via a web browser.
Major features of Nagios include:
- Monitoring of network services such as SMTP, HTTP, FTP, and NNTP
- Monitoring of host machines: processor load, disk and memory utilization, running processes, etc.
- Ability to define host hierarchy, permitting distinction between hosts that are down vs. hosts that are unreachable
- Support personnel alerts via email, pager, or other user-defined means when service or host problems occur or are resolved
- Ability to specify event handlers to be executed during service or host events for proactive problem remediation
- Accommodation for implementing redundant and distributed monitoring servers
- Outboard command interface that enables on-the-fly edits to be made to the tracking and notification activity through the utilization of event handlers, the web GUI, and independent software
- Preservation of host and service status after application restarts
- Scheduled downtime for suppressing host and service notifications when there are intentional outages
- Browser applet for examining current network status, notification and problem archive, event logs, etc.
- Authorization protocol that enables you to limit what users can see and do via the browser interface
MRTG Graphical Traffic Load Monitor
Multi Router Traffic Grapher (MRTG) is a free tool to track the bandwidth utilization on your network. Running under Windows or Linux, MRTG reads the traffic counters of network routers and produces web-accessible graphs which provide an up-to-date visual representation of this traffic.
MRTG permits you to graph the bandwidth through any SNMP-enabled network appliance. This can represent servers, routers, and switches. Administrators can utilize the resulting data to determine network trouble spots.
Type of information you can graph with MRTG include:
- Traffic in and out in bits or bytes per second
- Connection rate in connections per second
- Bandwidth in an out of a specific VIP/virtual server or node server
- Total number of concurrent sessions
Ask Progent for Network Monitoring Help
Progent's network monitoring specialists are experienced in operating a variety of utilities that can assist you to troubleshoot or tune your network infrastructure. For network monitoring assistance, phone Progent at 800-993-9400 or visit Contact Progent.
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