Projects

Have fun browsing my projects. In case you have any questions, don't hesitate to contact me. I'll answer your e-mail as soon as possible!

If you're interested in a RSS feed, you'll find it here.

Finally, you can filter the projects by tags:

Building a L2TP/IPSec server with OSPF routing capability

Over time, jumpNet's VPN servers became bottleknecks regarding bandwidth. Currently, the best VPN server in jumpNet offers 20MBit/s upstream, which is okay but not sufficient for large file transfers like backups. In this article, I describe how to build a L2TP/IPSec VPN server with OSPF rotuing capability.

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Updating the ESK stack (elasticsearch, syslog-ng, kibana)

Just a short notice on my ESK experiences regarding updating the stack.

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nginx as simple reverse proxy for HTTP basic auth

In my last post, I described how to set up a ESK stack (Elasticsearch, syslog-ng, Kibana). I also mentioned that the provided setup is not ideal from a security perspective. In this post I'll show you, how to use nginx as HTTP reverse proxy with HTTP basic auth to protect the Kibana web frontend.

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pimp my syslog server or "Setting up a syslog server with syslog-ng, Elasticsearch and Kibana"

The jumpNet grows, so do the logs. A little tired of grepping and tailing and lessing it came handy that I needed a solution for a customer with similar needs. After doing some research in the internet, I came across the so called ESK stack. Elasticsearch, syslog-ng and Kibana. Sure, I heared about Elasticsearch and Kibana, but till then I thought this is some hipster IT crap and - I never was so wrong. (Yeah, there is some prejudice coming with age and experience...)

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I was a webhoster

Several years ago, I was interested in webhosting technologies. As servers and elecricity didn't pay for themselves, I founded a small web hosting business to fund my hobby.

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2/2 IPSec over GRE with MikroTik's RouterOS and Linux

This is the part 1 of 2 explaining how to create GRE tunnels between a linux server and a MikroTik Router

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1/2 IPSec over GRE with MikroTik's RouterOS and Linux

This is the part 1 of 2, providing explanations and How-Tos for:

  • creating GRE tunnels between a linux server and a MikroTik Router
  • configuring IPsec to encrypt the traffic on the GRE interfaces

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Compiling FreeSWITCH

I worked a lot with asterisk when it came to provide VoIP. As there a plans to provide VoIP via WebRTC too and asterisk didn't prove to be very well suited because of SIP incompatibilities, I decided to have a look at FreeSWITCH.

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Virtualization with KVM

Do you know this scenario: Every time you want to try something out, you need to install linux on some hardware. After you've played around, the system is in a somehow messy state. The next time you want to try something, you need to start over...

I don't have time for this anymore and wanted to be more flexible. In the past I read a lot about qemu and kvm, so let's give it a try.

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