This is for folks intending to attend the IPSec tutorial:
https://www.netdevconf.info/0x12/session.html?ipsecike-tutoriallab

The hands-on involves student participation.
If you are going be running some non-linux OS on your laptop
for the Linux IPsec tutorial, please make sure to download and
install virtualbox:
 https://www.virtualbox.org/wiki/Downloads

Then please download the netdev-centos-devel.ova from
 https://www.files.netdevconf.info/d/2ee3635c9d4448e3b8b9/

and bring up the virtual machine in virtualbox by following
the menu pointers to do
  File -> Import Appliance
point it at the downloaded netdev-centos-devel.ova and go
through the steps to import appliance.

(If you run linux natively on the laptop, the extra indirection
through virtualbox is redundant of course!)

- login/passwd = netdev0x12/netdev0x12

- set up network as "Bridged Adapter" and over wireless network
  (assuming everyone is doing this on their laptop connected over
   conference wireless)
   
To ensure your libreswan is up to date, please run:

sudo rpm -ihv https://download.libreswan.org/binaries/rhel/7/libreswan-release-7-1.noarch.rpm
yum install libreswan

This also applies to RHEL/CentOS natively. Fedora 27/28 have it already
but you might need to grab it from the pending updates using:

        yum --enablerepo=updates=testing install libreswan

Debian Unstable should already have the latest 3.25 release. If you are using an older Debian
or Ubuntu, download the libreswan-3.25 source code and run:

        make deb

If you see errors about IPV6, run:

        echo USE_GLIBC_KERN_FLIP_HEADERS=true >> Makefile.inc.local
        echo "USE_SYSTEMD_WATCHDOG=false" >> Makefile.inc.local
        echo "USE_DNSSEC=false" >> Makefile.inc.local
        echo "USE_NIC_OFFLOAD=false" >>  Makefile.inc.local
        make deb

(see also https://libreswan.org/wiki/Libreswan_on_Debian_Wheezy)

(If you run linux natively on the laptop, the extra indirection
through virtualbox is redundant of course!)

Although keep in mind that you should have your VM's network bridged
to your wifi network, so that you can see other people's VMs without
NAT, as we will also be building IPsec tunnels between us.

I will also have a few spare VMs running on my own laptop, so those
without the disk space to install a VM can use Terminal and ssh into
one of my VM's.