PRTG Network Monitor (APPIAMSERVER)
News From Paessler
After Heartbleed and Shellshock the next security vulnerability is eager to make 2014 one of the years for admins to remember. This one is called POODLE (Padding Oracle on Downloaded Legacy Encryption) and was found in SSL 3.0, an almost 18-year-old encryption technology that is only used in less than 1% of worldwide SSL traffic?but it's nonetheless still used on the server side to support old browsers like, for example, Internet Explorer 6.
Monitoring via Secure Shell (SSH) enables you to gather information not only from many Linux/Unix and Mac OS systems, but also from the host hardware of your virtualization solution. It is essential to keep a close eye on the host servers as they are the backbone of all your virtual machines. A failure or even unusual behavior could lead to unforeseeable damage and require hours of work that could easily have been prevented.
If you have read all previous articles of this blog series, you're already quite an expert on how to utilize the PRTG Mini Probe API for your monitoring needs. After providing you with the proof of concept for monitoring your Linux systems with the Python Mini Probe, we want to show you another area of application?a probe for monitoring Java applications using Java Management Extensions: the JMX Mini Probe.
Last week has been crazy at the Paessler office ? crazy empty. Everyone was on the road, all over the world. We had a team in New York, in London and in our hometown of Nuremberg. We are just dropping in for a second to tell you about these events because tomorrow we are gone again.
The best way to monitor the traffic in your network depends on several factors. If you are the responsible administrator for a high traffic network which is equipped with a lot of Cisco devices, NetFlow is the ideal monitoring option. In flow monitoring, the router gathers bandwidth usage data (flows), aggregates these flows, and sends UDP packets with flow information back to PRTG Network Monitor.
Just when you're glad the last security crisis has been averted, the next one seems to lurk right around the corner. Be it the infamous OpenSSL Heartbleed Bug, or other vulnerabilities that led to data theft and attacks on the IT infrastructure ? you have to be prepared. This week Ars Technica reported about yet another bug: The GNU Bourne Again Shell (Bash) is affected by a security vulnerability. The Bash command-line shell is used in many Linux, Unix, and also Mac operating systems.
The more Windows clients you are responsible for in your network, the more likely the chances that some of them fail the Windows update once in a while?even with a sound update concept. To identify systems which haven't been updated with the latest security patches and performance enhancements, PRTG Network Monitor provides a simple but effective method: the Windows Last Update sensor.
The "Sensor of the Week" articles are a neat way for you to discover new areas of applications for PRTG Network Monitor?even ones you might yet not have thought of. This time, even if you already know and use the QoS (Quality of Service) Round Trip sensor, we urge you to keep on reading as we present to you a great new way to monitor the quality of a network connection without using remote probes: the PRTG QoS Reflector (open source) for the QoS Round Trip sensor!
This fall technology enthusiasts meet in New York City to attend the Interop Conference & Expo. Also Paessler will be there to emerge themselves into this exciting world to get inspired and, more importantly, to inspire. Meet our team and find out how PRTG Network Monitor can help you keep your network running while obtaining all the data you need!
When it comes to monitoring Linux or Unix systems, PRTG Network Monitor offers various interesting possibilities: Use one of PRTG's sensors for Linux monitoring via SNMP (Simple Network Management Protocol), SSH (Secure Shell), or WBEM (Web-Based Enterprise Management). Especially the SSH Script sensor offers you real freedom in customizing your Linux monitoring: Just write a script which returns the desired data from your Linux system (for example, the validity of your SSL certificate used by an Apache instance, see screenshot below), and you can monitor all changes and detect issues before they become a problem.
In the last few years the tasks of system administrators have changed quite a lot. Today networks are more than their physical layout of servers, routers, and switches reveals. With virtualization and cloud applications also the task of maintaining the network has grown more complex. Whether you use VMware or Hyper-V for virtualization, monitoring your virtual environments, and especially the host servers, is an absolute necessity when it comes to gaining a comprehensive view of your entire network structure.
In this week's blog article we present to you a very powerful sensor, you might yet not have been using. It's time to change that! Find out how the Passive Application Performance sensor has the potential to add real value to the way you monitor the performance of your servers and web applications.
The upcoming Saturday, August 30, 2014, the Paessler shop servers will be on maintenance. The necessary downtime for this purpose will start at 8 a.m. CEST and take at least a couple of hours. During this time you will not be able to reach the Paessler shop, our service portal, or activation services. We are sorry in advance for any inconveniences. But don't worry, all services will be available again as soon as possible! If you run into issues with the activation of a PRTG license, or if you cannot order a new license over the weekend, we recommend you to wait until Monday when we have fully recovered our systems. ?
As a system administrator you have to deal with a lot of data. Especially traffic data is of great importance when it comes to gaining a comprehensive overview of your network. The Remote Monitoring (RMON) standard provides specifications that enable you to dive even deeper into the package flow of your network. By displaying the traffic data for each port of your SNMP (Simple Network Monitoring Protocol) compatible devices in different channels, PRTG Network Monitor's SNMP RMON sensor helps you achieve a sound basis for detailed analysis.
After having read the previous article of this blog series, you know what you can achieve with the PRTG Mini Probe API. To quickly summarize: The API allows you to develop your very own kind of probe by tailoring it to the requirements of your network without being restricted by hardware or operating system. This article shows you a proof of concept for an often requested area of application: Detailed monitoring of Linux systems with probes that run directly under the target system. Using the PRTG Mini Probe API, you can now create and use a Python Probe to monitor your Linux system directly.
Thank you for using the PRTG Network Monitor
You are using the Freeware version of PRTG Network Monitor. This software covers all aspects of network monitoring: uptime monitoring, traffic and bandwidth usage monitoring combined with concise reporting and analysis features - one clear and simple solution for your entire network.
The software runs 24/7 on a Windows-based machine within your network, recording bandwidth and network usage parameters. Recorded data is stored in a database for historic reports. The easy to use web-based user interface allows to configure the devices and sensors that you want to monitor. You can create usage reports and provide colleagues and customers access to graphs and tables.
All common methods for network usage data acquisition are supported: SNMP and WMI, Packet Sniffing, and NetFlow. For performance and availability monitoring PRTG Network Monitor also includes more than 200 sensor types for all common network services (e.g. Ping, HTTP, SMTP, POP3, FTP, etc.), allowing to monitor your network systems for speed and failures. As soon as outages occur the software will alert you by sending emails, SMS, pager messages and other notifications. Request times and downtimes are constantly recorded in the database and you can compile performance downtime and SLA reports at any given time.