Read The Docs for REST APIs Made Simple, Part 2
Read The Docs has become the defacto standard for technical documentation, particularly in the Python world. You write your document content in reStructured ...
Posts by Year
2020
2019
Read The Docs for REST APIs Made Simple, Part 1
While developing software, documentation is frequently the furthest thing from a programmer’s mind. Writing documentation can be tedious and, well let’s just...
Tweet Ingestion with NiFi and Elasticsarch
Apache NiFi is an open source data ingestion system that offers up a rich variety of components you can assemble to ingest, enrich, and store data. NiFi can...
Packet Capture with Wireshark and Elasticsearch
Network packet capture and analysis are commonly done with tools like tcpdump, snort, and Wireshark. These tools provide the capability to capture packets li...
2018
Log Parsing with Morphlines, Part 2
Morphlines is an open source parsing engine that enables you to write parsing applications that can handle a wide variety of log formats. Part 1 of this ser...
Log Parsing with Morphlines, Part 1
Morphlines is an open source framework that eases the development of data ingestion and parsing applications written in Java. Originally developed by Clouder...
2015
Create an OSSEC Log Management Console with Kibana
It’s been awhile since Kibana 4 was released, so I figured it was about time I updated my OSSEC Log Management Console to use the latest and greatest Kibana....
RESTful Web Services with Jersey
Although Eclipse is commonly used for Java web service programming, it can be challenging to configure and use for testing. Luckily Eclipse is not the only I...
2014
Creating Elasticsearch Snapshots
Benjamin Franklin once wrote “…in this world nothing can be said to be certain, except death and taxes”. In this computerized world of ours, I would add havi...
Improved OSSEC Log Parsing with Logstash
The ELK stack (Elasticsearch-Logstash-Kibana) provides a cost effective alternative to commercial SIEMs for ingesting and managing OSSEC alert logs. Previous...
Elasticsearch Client Programming - Python
The first article in this two part series focused on developing Elasticsearch clients with Perl. Elasticsearch also has an excellent Python library which let...
Elasticsearch Client Programming - Perl
Since creating a log management system for the OSSEC HIDS with Elasticsearch, I have been busy applying this useful search technology in other projects. Elas...
TCP/IP Sockets with Time Out Capabilities
Recently I had a question from one of my readers about how to close connections on a server when there are no requests received after a certain period of tim...
2013
OSSEC Log Management with Elasticsearch
Among the many useful features of OSSEC is its capability to send alerts to any system that can consume syslog data. This makes it easy to combine OSSEC with...
XML Creation with DOM in Java
Awhile back I wrote a blog about parsing XML documents with the DOM facilities provided by Java. As it turns out you can use the same API to programmatically...
Securing Hadoop with OSSEC
Hadoop has built-in security facilities such as kerberos user authentication, encrypted RPC between system nodes and file encryption. While these are importa...
Condition Variable Class in C++
Condition variables are used in conjunction with mutexes by one thread to signal other threads that it has changed the state of a given variable. Synchronizi...
Mutex Class in C++
When multiple threads want to synchronize access to a shared resource they use mutexes and condition variables. A mutex enables a thread to block other threa...
Multithreaded Work Queue Based Server in C++
Creating a multithreaded TCP/IP protocol based server requires the capabilities to handle network communication, multithreading and transferring data between...
XML Parsing with DOM in Java
In my blog XML Parsing with DOM in C++, I used the Xerces-C++ XML Parser as the foundation for the XML parsing API. The classes from that article are also us...
TCP/IP Network Programming Design Patterns in C++
Network programming with the BSD Sockets API involves making a series of boilerplate calls to several operating system level functions every time you want to...
XML Parsing with DOM in C++
Having the ability to parse XML files is a requirement for a lot of applications these days. XML is a standard format for exchanging data between programs an...
Reversing a Linked List
In all my years as a software developer, reversing a singly linked list is not something I’ve had to do. But it is a commonly asked question in interviews fo...
Multithreaded Work Queue in C++
In a previous blog Java Style Thread Class in C++ I discussed how to develop a C++ class that enables you to create Pthread based objects that resemble Java ...
2012
Java Style Thread Class in C++
Java provides the Thread class that enables developers to easily create multiple threads in Java applications. Pthreads is commonly used for multithreaded pr...
Develop a Packet Sniffer with Libpcap
Libpcap is an open source C library that provides an API for capturing packets directly from the datalink layer of Unix derived operating systems. It is used...
2011
Java CSV Parser Using Regular Expressions
Parsing files is a real pain. You can find programming tools to help, regular expressions for example, and even languages that are built for that sort of thi...