NAME

       xl2tpd - Layer 2 Tunnelling Protocol Daemon.

DESCRIPTION

       xl2tpd is an implementation of the Layer 2 Tunneling Protocol (RFC 2661).  L2TP allows to tunnel PPP over
       UDP. Some ISPs use L2TP to tunnel user sessions from dial-in servers (modem banks, ADSL DSLAMs) to  back-
       end  PPP  servers.   Another  important  application  is  Virtual  Private Networks (VPN) where the IPsec
       protocol is used to secure the L2TP connection (L2TP/IPsec, RFC 3193).

       xl2tpd works by opening a pseudo-tty for communicating with pppd.  It runs completely  in  userspace  but
       supports kernel mode L2TP.

       xl2tpd  supports  IPsec  SA  Reference  tracking  to enable overlapping internak NAT'ed IP's by different
       clients (eg all clients connecting from their linksys internal IP  192.168.1.101)  as  well  as  multiple
       clients behind the same NAT router.

       This  implementation is based on L2TPd 0.61 from http://www.marko.net/l2tp and patches collected by Jacco
       de Leeuw at http://www.jacco2.dds.nl/networking/openswan-l2tp.html.

OPTIONS

       -D     This option prevents xl2tpd from detaching from the terminal and daemonizing.

       -l     This option tells xl2tpd to use syslog for logging even when -D was specified.

       -c <config_file>
              Set an alternate config file.  Fallback configuration file is /etc/l2tpd/l2tpd.conf.

       -s <secret_file>
              Tells xl2tpd to use an alternate "secrets" file.

       -p <pid_file>
              Set an alternate pid file.  Default is /var/run/xl2tpd/xl2tpd.pid.

       -C <control_file>
              Set an alternate control file.

FILES

       /etc/xl2tpd/xl2tpd.conf
              Configuration file of xl2tpd, used by default.

       /etc/xl2tpd/l2tp-secrets
              Secrets file, used by default.

       /var/run/xl2tpd/l2tp-control
              Control file, used by default.

BUGS

       Please use the github project page https://github.com/xelerance/xl2tpd to send bugreports, issues and any
       other feedback.

SEE ALSO

       xl2tpd.conf(5), xl2tpd-control(8), pppd(8)

COPYLEFT

       This  program  is  free  software;  you  can  redistribute it and/or modify it under the terms of the GNU
       General Public License as published by the Free Software Foundation; either version 2 of the License,  or
       (at your option) any later version.

       This  program  is  distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General  Public
       License for more details.

       You  should  have received a copy of the GNU General Public License along with this program (see the file
       LICENSE); if not, see https://www.gnu.org/licenses/,  or  contact  Free  Software  Foundation,  Inc.,  51
       Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

CONTRIBUTORS

       Alexander Dorokhov <alex.dorokhov@gmail.com>
       Alexander Naumov <alexander_naumov@opensuse.org>

AUTHORS

       Forked from l2tpd by Xelerance: https://github.com/xelerance/xl2tpd

       Michael Richardson <mcr@xelerance.com>
       Paul Wouters <paul@xelerance.com>
       Samir Hussain <shussain@xelerance.com>

       Previous development was hosted at sourceforge (http://www.sourceforge.net/projects/l2tpd) by:

       Scott Balmos <sbalmos@iglou.com>
       David Stipp <dstipp@one.net>
       Jeff McAdams <jeffm@iglou.com>

       Based off of l2tpd version 0.61.  Many thanks to Jacco de Leeuw <jacco2@dds.nl> for maintaining l2tpd.
       Copyright (C)1998 Adtran, Inc.
       Mark Spencer <markster@marko.net>

                                                    Sep 2020                                           xl2tpd(8)