An Introduction to FreeS/WAN, Part I
And now the moment of truth! First on George and then on Gracie, we enter the command:
ipsec setup restart
George will read /etc/ipsec.conf, load the george-gracie tunnel definition into its connection setup database and wait for connections. Gracie will do the same thing and then bring up the tunnel. Startup messages will be logged to /var/log/messages or /var/log/secure. If on the client system the output from ipsec setup restart ends with an “IPsec SA established” message, your tunnel is up! Try pinging or otherwise connecting to hosts on the remote network; the connection should behave no differently from before when you brought the tunnel up. In fact, you may want to run tcpdump on your tunnel-bound Ethernet interface to make sure that only ESP (Encapsulating Security Payload) packets (i.e., encrypted tunnel packets and not actual Ping, FTP packets, etc.) are being sent out.
Next month we'll look at another VPN scenario or two and delve deeper into the splendors of FreeS/WAN. Hopefully this was enough to get you started down the path to secure wireless networking!
Mick Bauer (email@example.com) is a network security consultant for Upstream Solutions, Inc., based in Minneapolis, Minnesota. He is the author of the upcoming O'Reilly book Building Secure Servers with Linux, composer of the “Network Engineering Polka” and a proud parent (of children).
|Hacking a Safe with Bash||Jul 28, 2015|
|KDE Reveals Plasma Mobile||Jul 28, 2015|
|Huge Package Overhaul for Debian and Ubuntu||Jul 23, 2015|
|diff -u: What's New in Kernel Development||Jul 22, 2015|
|Shashlik - a Tasty New Android Simulator||Jul 21, 2015|
|Embed Linux in Monitoring and Control Systems||Jul 20, 2015|
- Hacking a Safe with Bash
- KDE Reveals Plasma Mobile
- Huge Package Overhaul for Debian and Ubuntu
- The Controversy Behind Canonical's Intellectual Property Policy
- diff -u: What's New in Kernel Development
- Home Automation with Raspberry Pi
- Shashlik - a Tasty New Android Simulator
- Embed Linux in Monitoring and Control Systems
- One Port to Rule Them All!
- General Relativity in Python