Tag Archives: SNMP

fd-wv-fw04.cfg-172.16.1.6_connections-ws-l2-r1

MRTG/Routers2: Template FortiGate

A few weeks ago I constructed an MRTG/Routers2 template for the Fortinet FortiGate firewalls. I am using it for monitoring the FortiGate from my MRTG/Routers2 server. With the basic MRTG tool “cfgmaker” all graphs for the interfaces are generated automatically. My template is an add-on that appends graphs for CPU, memory, and disk usage, as well as connections and VPN statistics. Furthermore, it implements the ping statistics graph and a “short summary”, which only shows the system relevant graphs.

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fd-wv-fw01.cfg-172.16.1.1_ethernet0_3-ws-l2-r2

MRTG/Routers2: Template Juniper SSG

Finally, this is how I am monitoring my Juniper ScreenOS SSG firewalls with MRTG/Routers2. Beside the interfaces (that can be built with cfgmaker) I am using my template in order to monitor the CPU & memory, count of sessions & VPNs, count of different kind of attacks, etc.

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ra.cfg-192.168.122.3_concurrentusers-ws-l2

MRTG/Routers2: Template Juniper SA/MAG

I am monitoring an (old) SA-2000 cluster of Juniper Secure Access devices with my MRTG/Routers2 system. With the JUNIPER-IVE-MIB I built the configuration file for that monitoring system. In this blog post, I show the graphs generated with MRTG/Routers2 and publish my cfg file as a template.

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ciscoasa.example.com_cfg-10_10_1_1_connectionsxlates-ys-l2

MRTG/Routers2: Template Cisco ASA

I constructed a MRTG/Routers2 configuration template for the Cisco ASA firewall which consists the OIDs (graphs) for the interfaces, CPU, memory, VPNs, connections, ping times, and traceroute hop counts. With only four search-and-replace changes as well as a few further specifications, the whole SNMP monitoring for that firewall is configured.

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fd-wv-fw01.cfg-_172.16.1.1_IPv4IPv6-ds-l2-r1

IPv4 vs. IPv6 Traffic Statistics on Routers

I am very interested in statistics about the usage of IPv6 on Internet routers and firewalls. The problem is, that most routers/firewalls do not have unique SNMP OIDs for IPv4 and IPv6 traffic, but only the normal incoming/outgoing packet counters per interface. Therefore I am using two independent ethernet ports and cables between my outer router and my first firewall, one for IPv4-only and the other one for IPv6-only traffic. Now I have independent statistics for each protocol and can combine them in one summary graph. (Though I know that this will never be a “best practice” solution…)

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MRTG/Routers2: Template MessPC Ethernetbox

Eine sehr praktische Variante, möglichst viele Sensoren übers Netzwerk abzufragen ohne dabei viel basteln zu müssen, ist die Ethernetbox von MessPC. Man kann sie zum Beispiel mit mehreren kombinierten Temperatur/Luftfeuchtigkeits-Sensoren bestücken. Die Auswertung erfolgt am besten über ein zentrales Monitoring-System.

Auf der Homepage von MessPC befindet sich zwar eine kleine Dokumentation für die Verwendung von MRTG, allerdings wird dort ein zusätzliches Skript vorgestellt, was dank der Verwendung von SNMP ja gar nicht nötig ist. Deswegen poste ich hier mein Template von einem MessPC mit zwei Kombisensoren für Temperatur/Luftfeuchtigkeit, welches für die Verwendung mit MRTG und Routers2 gemäß meiner Installation geeignet ist. Mit nur drei Suchen-und-Ersetzen Durchläufen hat man das Template angepasst.

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temperature.cfg-temperature_fdorf-outside-ws-l2

Measuring Temperatures with PCsensor’s TEMPerHUM Sensor

I am always interested in capturing real values via hardware devices in order to generate the appropriate graphs with my monitoring system. Of course, the outside temperature in our city was at the pole position for such a project. Therefore I ordered a few temperature/humidity sensors from PCsensor (via eBay), plugged them via USB on my Raspberry Pi (Raspbian Linux), and queried them via SNMP from my MRTG/Routers2 monitoring server. Here is the whole story:

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jw-vm01.cfg-localhost-memory-ms-l2

MRTG/Routers2: Adding a Linux Host

This post describes how to add a Linux machine to the MRTG/Routers2 monitoring server. First, the host must be able to process SNMP requests. Then, a *.cfg file for MRTG/Routers2 is created by running the “cfgmaker” tool with a host-template. Since a few values are wrong in the cfgmaker file, I also explain how to correct them. Finally, I am adding the mrtg-ping-probe lines to the configuration.

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fd-wv-sw02.cfg-192.168.120.6_Fa0_1-ds-l2

MRTG/Routers2: Adding a Switch

The Multi Router Traffic Grapher (MRTG) can, of course, not only monitor routers via SNMP, but any devices that support the Simple Network Management Protocol, e.g., switches. With the tool “cfgmaker” it is quite easy to add switches with many ports to the monitoring system. However, some subsequent work is needed to have a clean configuration. This blog post presents a step-by-step guide for adding a switch into MRTG/Routers2.

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fd-wv-ro01.cfg-172.16.0.1_Fa0-ds-l2

MRTG/Routers2: Adding a Cisco Router

This post shortly explains the process of adding a Cisco router into the monitoring system “MRTG with Routers2” as I explained it here. It gives an example on how SNMP is activated on the router and how the *.cfg file for MRTG/Routers2 is created with the additional values for CPU and memory usage.

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routers2

MRTG with RRDtool and Routers2 – Installation from Scratch

I always wanted to monitor my private network with an open source tool. Since I knew some nice statistics, e.g. from the DE-CIX (printed with RRDtool) or from the Uni-Gießen (generated with MRTG), I had the idea of installing such a system by myself. Luckily I found a book from Steve Shipway, called “Using MRTG with RRDtool and Routers2“, which actually disappointed me because it did not offer a complete installation guide but mainly further information about fine-tuning the appropriate tools.

Therefore, I want to show a complete step-by-step installation of all the needed tools in order to monitor a network with MRTG, RRDtool and Routers2.  “From scratch” means that there are no prerequisite to this installation guide except a plain Linux server (in my case a Ubuntu Linux) such as presented here. Okay, let’s go: Continue reading MRTG with RRDtool and Routers2 – Installation from Scratch