NAME

       l2tpns - Layer 2 tunneling protocol network server (LNS)

SYNOPSIS

       l2tpns [-d] [-v] [-c file] [-h hostname]

DESCRIPTION

       l2tpns is a daemon for terminating layer 2 tunneling protocol (L2TP: RFC2661) sessions.

       l2tpns  is  a  complete  L2TP  implementation.  It supports the LAC, LNS, PPPOE and DHCPv6
       server.

       Once running, l2tpns may be controlled by telnetting to port 23 on the machine running the
       daemon and with the nsctl utility.

OPTIONS

       -d  Detach from terminal and fork into the background.  By default l2tpns will stay in the
       foreground

       -v Increase verbosity for debugging.  Can be used multiple times

       -c file Specify configuration file

       -h hostname Force hostname to hostname

FILES

       /etc/l2tpns/startup-config
       The default configuration file

       /etc/l2tpns/ip_pool
       IP address pool configuration

       /etc/l2tpns/users
       Username/password configuration for access to admin interface

SIGNALS

       SIGHUP
       Reload the config from disk and re-open log file

       SIGTERM, SIGINT
       Stop process.  Tunnels and sessions are not terminated.  This signal  should  be  used  to
       stop l2tpns on a cluster node where there are other machines to continue handling traffic

       SIGQUIT
       Shut down tunnels and sessions, exit process when complete

MANAGED RADIUS ATTRIBUTE

       Ascend-Client-Primary-DNS, Ascend-Client-Secondary-DNS
       Specifies a primary and secondary DNS server address to send to user

       Delegated-IPv6-Prefix
       Assign a network address IPv6 prefix to a user by DHCPv6

       Framed-IP-Address
       The address to be configured for the user (IPv4 address of the interface ppp)

       Framed-Route
       provides routing information to be configured for the user

       Framed-IPv6-Route
       Has the same action as Delegated-IPv6-Prefix.  Delegated-IPv6-Prefix is the correct one to
       use

       Framed-IPv6-Address
       IPv6 address to be assigned to the user by DHCPv6 (IPv6 address of the interface ppp)

       Idle-Timeout
       disconnects the session if no data for more than Idle-Timeout (in seconds)

       Session-Timeout
       disconnects the user session when the time Session-Timeout is reached (in seconds)

       Tunnel-Type,   Tunnel-Medium-Type,   Tunnel-Server-Endpoint,   Tunnel-Password,    Tunnel-
       Assignment-Id
       attributes returned by the Radius of the remote LNS server (LAC functionality)

              example, Radius that return the information of 2 remote LNS server with which must be open a L2TP TUNNEL:

              - Tunnel-Type: 1 = L2TP
              - Tunnel-Medium-Type: 1 = IPv4
              - Tunnel-Password: 1 = "TheSecretL2TP"
              - Tunnel-Server-Endpoint: 1 = "88.xx.xx.x1"
              - Tunnel-Assignment-Id: 1 = "friendisp_lns1"
              - Tunnel-Type: 2 = L2TP
              - Tunnel-Medium-Type: 2 = IPv4
              - Tunnel-Password: 2 = "TheSecretL2TP"
              - Tunnel-Server-Endpoint: 2 = "88.xx.xx.x2"
              - Tunnel-Assignment-Id: 2 = "friendisp_lns2"

SEE ALSO

       startup-config(5), nsctl(8)

AUTHORS

       This  manual  page  was written by Jonathan McDowell <noodles@earth.li> and Fernando Alves
       (<fendo@sameswifi.fr>), for the Debian GNU/Linux system (but may be used by others).

Layer 2 tunneling protocol network serverJanuary 31, 2021                               L2TPNS(8)