When you run your own blog on your own VPS, I guess you have spent already some of your time on optimizing the web performance of your page. One of the most important part, is to optimize images for your website. Many of us use WordPress, and also this page has been created by using…
Splunk Modular Input For Python2 And Python3
Starting from 1st January 2020, Python version 2.x is deprecated. Several functions which were running fine on Python2 are not working anymore with Python3. The announcement can be found here. Splunk is requesting all developers, who published a Splunk app, to make their modular input or other scripts work, either with Python 3 or both versions….
PCAP Analyzer for Splunk 4.2.0 – New Problem Detection Dashboard
Starting from today, the new version 4.2.0 of the PCAP Analyzer for Splunk was uploaded. Beside several small fixes, the new version comes with a new dashboard which should help to analyze Wireshark traces – the “Problem Detection” dashboard. What is it? The new Dashboard has the following 7 panels: Delta time (sec) by packet…
How to take a java heapdump without downtime!
Everyone knows that it happens many times that a JVM runs into an “Out of Memory” condition. If it happens one time, no problem. Usually a simple restart of the application should solve the problem. But if you continuesly spending time in restarting, it is time to analyze why the application is running out of…
SCHWARTZDANIEL.COM – Domain Name Changed!
Hi there! I’ve decided to move my domain name tcpdump-it.com to my personal domain name schwartzdaniel.com. The reason for this change is that I want to extend my writing in more areas related to my passion. Probably I will also perform some design changes. If you see something strange on my new domain, please don’t…
Install And Configure Ansible To Start Your Packet Capture
For my previous blog post about ansible and my written ansible-playbook I’ve received some feedback and questions. I’ve decided to give you a short instruction how to install and configure ansible to start your own packet capture with my ansible-playbook tcpdump.yml. Installation For this purpose I am using a fresh created t2.micro AWS EC2 Instance….
PCAP Analyzer for Splunk – Getting Started
Too many times we have situations we suffer from random network connection / latency problems which might be caused by a huge amount of traffic sent over the network or even a problem directly on the specific endpoints. If you have such kind of problems, in the most of the cases it’s mandatory to capture…
Start Your Packet Capture With Ansible
What is Ansible? Ansible is an agentless open source automation tool used for configuration management and other purposes. At the moment I also use it to collect diagnosis data. Ansible is working via SSH and can connect to multiple server in parallel (from your source server). It connects to the remote sides and can executes…
Schedule TCPDUMP with CRON
Why I need to run tcpdump with cron? Sometimes problems happens while we are sleeping and disappear without any intervention in the morning. Unfortunately we are missing diagnosis data to drive the proper root cause analysis. And of course even we are praying that those problems don’t come back, they will come back. So prepare…
Capture Network Traffic With TCPDUMP
What is tcpdump? In the manpage the entry sentence of the description describes it in good words “… Tcpdump prints out a description of the contents of packets on a network interface…” It will help you to capture each network in-going and out-going packet on your interface and display it directly on your command line…