Networking Archive

Network Weathermap – Network Map Tool

Recently I came across a neat program written in PHP, called Network Weathermap (http://network-weathermap.com). It helps you with drawing a network map and shows live data on it. I never seen it before, although it’s been around for quite a while. I decided to post a tutorial of it because there are still people out

Amazon ELB and AutoScaling scripts

AutoScaling Amazon itself doesn’t provide Auto Scaling scripts, so you have to write your own ones. It’s up to you to decide when to start an instance and add it to load balancer. We can achieve this with API calls and for this purpose Amazon even provided a CLI. Link to CLI tools: http://aws.amazon.com/cli/ (Note: For

Amazon ELB and Client side certificates

The problem Amazon’s ELB only allows you to setup loadbalancer with a normal SSL certificate and does not support 2 way SSL authentication. To overcome this issue, there are certain “hacks” you can make use of. At the time of writting this post, Amazon AWS was in the process of implementing this feature, but it

Hetzner’s ban, NAT leaking internal traffic on WAN interface and New Year’s

  As I mentioned few times, we have small cluster of servers located on Hetzner’s datacenters. We use Vyatta for our core router and we NAT all additional servers thru it, becouse Hetzner’s dedicated servers don’t support direct routing. Incident On new year’s eve, my phone started ringing insanely and I noticed one of our

Converting your InnoDB MySQL server to TokuDB (how we did it)

What is TokuDB? TokuDB is a storage engine for MySQL and MariaDB that dramatically improves the performance of large databases (typically 50 GBs or larger). By replacing 40-year-old B-tree technology with patented Fractal Tree® technology, TokuDB speeds indexing by 10x or more, and reducing the size of the database by upt o 90%. Because of