dCTF is approaching and we can't wait to have you in!

dCTF hosts will be reachable via an OpenVPN tunnel. The configuration for
your team is available at:

  http://www.cs.vu.nl/~sullivan/dCTF/OpenVPN_Conf/dCTF_team-bkitsek-dPR5TY2W2c5c0FnB.tar.gz.gpg

The configuration tarball is encrypted with a symmetric key: the username
you received upon registration. Treat both the VPN configuration and the
username as strictly confidential: these are the information that will be
identifying you throughout the game!

It should be sufficient to untar the OpenVPN configuration tarball into
your /etc/openvpn/ folder. Starting the client should automatically set
the tunnel up for you (tested on Linux and Mac OS X).

The tunnel IPs will be in the range of 10.40.40.0/24
The game IPs will be in the range of 10.42.42.0/24

Please, make the appropriate arrangement to avoid conflicts with such
settings. To check whether your VPN tunnel is working properly, ping
the IP address 10.42.42.240 and see whether you get a reply (success).

*************************************************************************
** Please, report back to us whenever you have the VPN tunnel working  **
** properly (or not), ASAP. We won't be having much time to check      **
** network settings as we're approaching the start of dCTF!            **
*************************************************************************

We will be making available a QEMU image, soon, which will be part of the
game. Your OpenVPN server will be your Internet gateway: it MUST act as a
NAT box for the clients connected to its local LAN. As a matter of fact,
only VPN tunnel IPs are routed in the game's network (the QEMU image may
be made available via the NAT box with a simple firewall/port forwarding
rule).

For local teams: we will be providing you with one Ethernet cable (the
Internet). It's up to you to bring your own switch and power strips and to
set up the OpenVPN server/NAT box accordingly.

Do not hesitate to contact us at <dimva-oc@cs.vu.nl>, should you encounter
any problem.

May the force be with you...