Pantelis Roditis's blog

Using OpenBGPD to distribute pf table updates to your servers

OpenBGP+PFOne of the challenges faced when managing our OpenBSD firewalls is the distribution of IPs to pf tables without manually modifying /etc/pf.conf on each of the firewalls every time.

This task becomes quite tedious, specifically when you want to distribute different types of changes to different systems (eg administrative IPs to a firewall and spammer IPs to a mail server), or if you need to distribute real time blacklists to a large number of systems.

The following post outlines one a method of distributing such lists using OpenBGP to deliver them into your pf tables.

Using OpenBSD and vxlan to overlay remote lans

Have you ever wanted to "merge" two or more remote lans between your virtualized hosts? The following blog post will outline the steps required to configure VXLAN tunneling between two hosts.

Heads up, Echofish got a major feature boost release

Echofish Welcome page screenshot
Hi everyone,

We've been working hard over the last couple of months for a new release of Echofish and boy do we have a release for you, keep on reading ...

Putting together the Athcon 2012 CTF - Part II - Network

Hi everyone,

We finally got around posting the long-promised Part II of "Putting together the Athcon 2012 CTF".

With the scenario out of the way it was time to setup the network and with it, shape-up the gameplay a little bit. At this point, we only had a very vague idea of how the participants would be finally rewarded.

Putting together the Athcon 2012 CTF - Part I

Like we promised on the previous post, here is the first part about how Athcon 2012 CTF was designed and implemented, what the contestants had to deal with and how we made the visuals you saw there.