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Category: Monitoring, Management, Measurement

Server monitoring with Elastic Stack

Server monitoring with Elastic Stack

  • Author: Miroslav Kohútik
  • Elastic Stack Version: 6.7.0
  • Operating system : Ubuntu 16.04

Elastic stack is a group of products from the Elastic company built around the Elasticsearch database designed to process data from any type of source.

In this article we will show you how to monitor the state of the Elasticsearch service and server load using the Elastic Stack services.

Installation of Zabbix 4.0

Installation of Zabbix 4.0

  • Author: Miroslav Kohútik
  • Operating system : Ubuntu 16.04

This guide describes the individual steps of the installation process of Zabbix version 4.0 on Ubuntu 16.04 operating system.

Zabbix is a free open-source monitoring software. Zabbix provides monitoring of many metrics about the state of the administered network and its devices and services (including virtual machines).

Port-Mirroring


Port-Mirroring

Port mirroring is used on a network switch to send a copy of network packets seen on one switch port (or an entire VLAN) to a network monitoring connection on another switch port. This is commonly used for network appliances that require monitoring of network traffic such as an intrusion detection system, passive probe or real user monitoring (RUM) technology that is used to support application performance management (APM).

In our particular case, the faculty provided us with a Cisco Catalyst 2960 switch. We have configured this switch to mirror all internet-bound data traffic traversing the interface connected to network gateway, to the interface connected to Moloch server. As a result, we can now monitor all inbound and outbound lab traffic.

Switch(config)#monitor session 1 source fa0/1 both  

– This command specifies source interface as fa 0/1. The parameter “both” specifies both directions to be monitored.

Switch(config)#monitor session 1 destination interface fa0/24 

– This command defines the destination interface of mirrored traffic

Port-Mirror

Sources

  • CRZP Komplexný systém pre detekciu útokov a archiváciu dát – Moloch

Installing and configuring Homer SIP capture server – debian 64b squeeze – howto


Description: Homer is an Open Source SIP Capture server by Alexandr Dubovikov & Friends, based on OpenSER/Kamailio and supporting HEPv1/v2 (Homer Encapsulation Protocol) & IP proto 4 (IPIP) encapsulation and monitoring/mirroring port capture modes. Homer ships with a flexible and lightweight capture agent for unsupported scenarios and a powerful browser based UI (webHomer).

Web:

Using tcpdump for SIP diagnostics


TCPdump is a powerful command-line packet analyzer, which may be used for a SIP message sniffing/analyzing. TCPdump is preinstalled on many linux distributions, or may be installed directly from debian repository:

apt-get install tcpdump

TCPdump allows write sniff to a file or display it realtime. Its usage for SIP message analysis may look like: