Brief Installation guide for L2TPNS

1. Requirements

    * You must have libcli installed to enable the command-line
      interface. You can get it from http://sourceforge.net/projects/libcli.
      If you don't have it, command-line support will not be compiled in.

    * A kernel with iptables support

    * If you want to use throttling, you must have a kernel and a tc (iproute) which supports HTB.


2. Compile

./configure --prefix=/usr --sysconfdir=/etc/l2tpns
make


3. Install

    * make install. This does:
	* Install the binaries into /usr/bin (l2tpns, cluster_master and nsctl)
	* Create config dir /etc/l2tpns and create default config files
	* Ensures that /dev/net/tun exists

    * Modify config file. You probably need to change most of the config options.

    * Set up basic firewall rules. This should be done in an init script.

	iptables -t nat -N l2tpns
	iptables -t nat -A PREROUTING -j l2tpns
	iptables -t mangle -N l2tpns
	iptables -t mangle -A PREROUTING -j l2tpns

    * Set up walled garden firewall rules. This should be done in an init
      script. This is not required unless you are using the garden plugin.

	iptables -t nat -N garden >/dev/null 2>&1
	iptables -t nat -F garden
	iptables -t nat -A garden -p tcp -m tcp --dport 25 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p udp -m udp --dport 53 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p tcp -m tcp --dport 53 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p tcp -m tcp --dport 80 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p tcp -m tcp --dport 110 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p tcp -m tcp --dport 443 -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p icmp -m icmp --icmp-type echo-request -j DNAT --to 192.168.1.1
	iptables -t nat -A garden -p icmp -j ACCEPT
	iptables -t nat -A garden -j DROP

    * Set up IP address pools in /etc/l2tpns/ip_pool

    * Set up clustering

	* Run cluster_master on a separate machine
	* Set the "cluster master" and "bind address" parameters in /etc/l2tpns/l2tpns.cfg

    * Make l2tpns run on startup

    * Test it out




This software is quite stable and is being used in a production
environment at a quite large ISP. However, you may have problems
setting it up, and if so, I would appreciate it if you would file
useful bug reports on the Source Forge page:

http://sourceforge.net/projects/l2tpns/

-- David Parrish