It's easy enough to get a pptp client going on a Ubuntu 9.04 (Jaunty) desktop:
sudo apt-get install network-manager-pptp
However, I can't seem to find documentation find a corresponding L2TP client to connect to our Windows VPN server at work remotely. I have a certificate from our offline CA (pkcs12 format with the public/private keys + CA public cert in one file), and in Windows I'd simply install via the MMC certificates snap-in, choose L2TP connection in the native client, and I'd be good to go.
Anyone have any ideas about setting up L2TP in Ubuntu? Or should I just use PPTP -- my understanding is that it's much less secure than L2TP, but is that still true? Will I need to ensure EAP authentication if I do stick with PPTP? Thanks in advance.
Try this guide, pretty comprehensive: http://www.jacco2.dds.nl/networking/linux-l2tp.html
I can't tell you much, here is the a package for doing l2tp and here is a howto that make be able to help you.
In 2018 you can use
network-manager-l2tp
- see my answer here for connecting to a Windows VPN server from Linux.