L2TP Client: Linux

Linux / xl2tpd

1. Ensure the following kernel options are set or the corresponding modules are available:
1. CONFIG_PPPOL2TP
2. CONFIG_L2TP
2. Install xl2tpd and pppd on your Linux router.
3. Edit /etc/xl2tpd/xl2tpd.conf to contain the following:
   [lac aaisp]
lns = l2tp.aaisp.net.uk
require authentication = no
pppoptfile = /etc/ppp/options.aaisp
4. Create /etc/ppp/options.aaisp containing the following (obviously change the name and password to match your L2TP login details):
   +ipv6
ipv6cp-use-ipaddr
name xyz@a.X
password Your_xyz@A.X_password
noauth
5. Create the xl2tpd control file:
   mkdir -p /var/run/xl2tpd
touch /var/run/xl2tpd/l2tp-control
6. Start the xl2tpd service (for systemd, use service command for older RC systems):
   systemctl start xl2tpd
7. Tell the daemon to connect to aaisp:
   echo "c aaisp" > /var/run/xl2tpd/l2tp-control

This should give you a new PPP device which encapsulates the L2TP connection.

Troubleshooting

Logs are written /var/log/daemon.log If you see "No such tunnel", you might want to try restarting the daemon

Ubuntu / Network Manager

First, install the packages

apt install xl2tpd network-manager-l2tp network-manager-l2tp-gnome

Then using Network Manager, create the L2TP connection:

1. Add a L2TP connection
   1. Click the Network icon on the task bar
   2. Click Settings
   3. Next to 'VPN', click the + icon
2. Enter in the settings:
   1. Name: anything, eg AAISP
   2. Type: Password
   3. User name: your login we gave you, eg xxx@a.1
   4. Password: the password we gave you
   5. Click Apply
3. Connect/disconnect via the network icon on the taskbar

• 

  Add a L2TP connection

• 

  Enter in the settings

• 

  Connect/disconnect