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	diff --git a/data/templates/l2tp/l2tp.config.tmpl b/data/templates/l2tp/l2tp.config.tmpl
	index 0dcff1371..ba78cadcd 100644
	--- a/data/templates/l2tp/l2tp.config.tmpl
	+++ b/data/templates/l2tp/l2tp.config.tmpl
	@@ -1,147 +1,147 @@
	### generated by accel_l2tp.py ###
	[modules]
	log_syslog
	l2tp
	chap-secrets
	{% for proto in auth_proto: %}
	{{proto}}
	{% endfor%}

	{% if auth_mode == 'radius' %}
	radius
	{% endif -%}

	ippool
	shaper
	ipv6pool
	ipv6_nd
	ipv6_dhcp

	[core]
	thread-count={{thread_cnt}}

	[log]
	syslog=accel-l2tp,daemon
	copy=1
	level=5

	{% if dnsv4 %}
	[dns]
	{% for dns in dnsv4 -%}
	dns{{ loop.index }}={{ dns }}
	{% endfor -%}
	{% endif %}

	{% if dnsv6 %}
	[ipv6-dns]
	{% for dns in dnsv6 -%}
	{{ dns }}
	{% endfor -%}
	{% endif %}

	{% if wins %}
	[wins]
	{% for server in wins -%}
	wins{{ loop.index }}={{ server }}
	{% endfor -%}
	{% endif %}

	[l2tp]
	verbose=1
	ifname=l2tp%d
	ppp-max-mtu={{ mtu }}
	mppe={{ ppp_mppe }}
	{% if outside_addr %}
	bind={{ outside_addr }}
	{% endif %}
	{% if lns_shared_secret %}
	secret={{ lns_shared_secret }}
	{% endif %}

	[client-ip-range]
	0.0.0.0/0

	{% if client_ip_pool or client_ip_subnets %}
	[ip-pool]
	{% if client_ip_pool %}
	{{ client_ip_pool }}
	{% endif -%}
	{% if client_ip_subnets %}
	{% for sn in client_ip_subnets %}
	{{sn}}
	{% endfor -%}
	{% endif %}
	{% endif %}
	{% if gateway_address %}
	gw-ip-address={{ gateway_address }}
	{% endif %}

	{% if auth_mode == 'local' %}
	[chap-secrets]
	chap-secrets={{ chap_secrets_file }}
	{% elif auth_mode == 'radius' %}
	[radius]
	verbose=1
	{% for r in radius_server %}
	server={{ r.server }},{{ r.key }},auth-port={{ r.port }},req-limit=0,fail-time={{ r.fail_time }}
	{% endfor -%}
	{% endif %}

	acct-timeout={{ radius_acct_tmo }}
	timeout={{ radius_timeout }}
	max-try={{ radius_max_try }}

	{% if radius_nas_id %}
	nas-identifier={{ radius_nas_id }}
	{% endif -%}
	{% if radius_nas_ip %}
	nas-ip-address={{ radius_nas_ip }}
	{% endif -%}
	{% if radius_source_address %}
	bind={{ radius_source_address }}
	{% endif -%}

	[ppp]
	verbose=1
	check-ip=1
	single-session=replace
	lcp-echo-timeout={{ ppp_echo_timeout }}
	lcp-echo-interval={{ ppp_echo_interval }}
	lcp-echo-failure={{ ppp_echo_failure }}
	{% if ccp_disable %}
	ccp=0
	{% endif %}
	{% if client_ipv6_pool %}
	ipv6=allow
	{% endif %}


	{% if client_ipv6_pool %}
	[ipv6-pool]
	-{% for prefix in client_ipv6_pool %}
	-{{ prefix }}
	+{% for p in client_ipv6_pool %}
	+{{ p.prefix }},{{ p.mask }}
	{% endfor %}
	-{% for prefix in client_ipv6_delegate_prefix %}
	-delegate={{ prefix }}
	+{% for p in client_ipv6_delegate_prefix %}
	+delegate={{ p.prefix }},{{ p.mask }}
	{% endfor %}

	{% endif %}

	{% if client_ipv6_delegate_prefix %}
	[ipv6-dhcp]
	verbose=1
	{% endif %}

	{% if radius_shaper_attr %}
	[shaper]
	verbose=1
	attr={{ radius_shaper_attr }}
	{% if radius_shaper_vendor %}
	vendor={{ radius_shaper_vendor }}
	{% endif -%}
	{% endif %}

	[cli]
	tcp=127.0.0.1:2004
	sessions-columns=ifname,username,calling-sid,ip,{{ ip6_column \| join(',') }}{{ ',' if ip6_column }}rate-limit,type,comp,state,rx-bytes,tx-bytes,uptime

	diff --git a/interface-definitions/vpn-l2tp.xml.in b/interface-definitions/vpn-l2tp.xml.in
	index 84dd8187c..d4286a810 100644
	--- a/interface-definitions/vpn-l2tp.xml.in
	+++ b/interface-definitions/vpn-l2tp.xml.in
	@@ -1,530 +1,562 @@
	<?xml version="1.0"?>
	<interfaceDefinition>
	<node name="vpn">
	<children>
	<node name="l2tp" owner="${vyos_conf_scripts_dir}/vpn_l2tp.py">
	<properties>
	<help>L2TP Virtual Private Network (VPN)</help>
	</properties>
	<children>
	<node name="remote-access">
	<properties>
	<help>Remote access L2TP VPN</help>
	</properties>
	<children>
	<leafNode name="mtu">
	<properties>
	<help>Maximum Transmission Unit (MTU)</help>
	<constraint>
	<validator name="numeric" argument="--range 128-16384"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="outside-address">
	<properties>
	<help>External IP address to which VPN clients will connect</help>
	<constraint>
	<validator name="ipv4-address"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="gateway-address">
	<properties>
	<help>Gatway address uses as client tunnel termination point</help>
	<constraint>
	<validator name="ipv4-address"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="name-server">
	<properties>
	<help>Domain Name Server (DNS) propagated to client</help>
	<valueHelp>
	<format>ipv4</format>
	<description>Domain Name Server (DNS) IPv4 address</description>
	</valueHelp>
	<valueHelp>
	<format>ipv6</format>
	<description>Domain Name Server (DNS) IPv6 address</description>
	</valueHelp>
	<constraint>
	<validator name="ipv4-address"/>
	<validator name="ipv6-address"/>
	</constraint>
	<multi/>
	</properties>
	</leafNode>
	<node name="lns">
	<properties>
	<help>L2TP Network Server (LNS)</help>
	</properties>
	<children>
	<leafNode name="shared-secret">
	<properties>
	<help>Tunnel password used to authenticate the client (LAC)</help>
	</properties>
	</leafNode>
	</children>
	</node>
	<leafNode name="ccp-disable">
	<properties>
	<help>Disable Compression Control Protocol (CCP)</help>
	<valueless />
	</properties>
	</leafNode>
	<node name="ipsec-settings">
	<properties>
	<help>Internet Protocol Security (IPsec) for remote access L2TP VPN</help>
	</properties>
	<children>
	<node name="authentication">
	<properties>
	<help>IPsec authentication settings</help>
	</properties>
	<children>
	<leafNode name="mode">
	<properties>
	<help>Authentication mode for IPsec</help>
	<valueHelp>
	<format>pre-shared-secret</format>
	<description>Use pre-shared secret for IPsec authentication</description>
	</valueHelp>
	<valueHelp>
	<format>x509</format>
	<description>Use X.509 certificate for IPsec authentication</description>
	</valueHelp>
	<constraint>
	<regex>(pre-shared-secret\|x509)</regex>
	</constraint>
	<completionHelp>
	<list>pre-shared-secret x509</list>
	</completionHelp>
	</properties>
	</leafNode>
	<leafNode name="pre-shared-secret">
	<properties>
	<help>Pre-shared secret for IPsec</help>
	</properties>
	</leafNode>
	<node name="x509">
	<properties>
	<help>X.509 certificate</help>
	</properties>
	<children>
	<leafNode name="ca-cert-file">
	<properties>
	<help>File containing the X.509 certificate for the Certificate Authority (CA)</help>
	<valueHelp>
	<format><text></format>
	<description>File in /config/auth</description>
	</valueHelp>
	</properties>
	</leafNode>
	<leafNode name="crl-file">
	<properties>
	<help>File containing the X.509 Certificate Revocation List (CRL)</help>
	<valueHelp>
	<format><text></format>
	<description>File in /config/auth</description>
	</valueHelp>
	</properties>
	</leafNode>
	<leafNode name="server-cert-file">
	<properties>
	<help>File containing the X.509 certificate for the remote access VPN server (this host)</help>
	<valueHelp>
	<format><text></format>
	<description>File in /config/auth</description>
	</valueHelp>
	</properties>
	</leafNode>
	<leafNode name="server-key-file">
	<properties>
	<help>File containing the private key for the X.509 certificate for the remote access VPN server (this host)</help>
	<valueHelp>
	<format><text></format>
	<description>File in /config/auth</description>
	</valueHelp>
	</properties>
	</leafNode>
	<leafNode name="server-key-password">
	<properties>
	<help>Password that protects the private key</help>
	</properties>
	</leafNode>
	</children>
	</node>
	</children>
	</node>
	<leafNode name="ike-lifetime">
	<properties>
	<help>IKE lifetime</help>
	<valueHelp>
	<format><30-86400></format>
	<description>IKE lifetime in seconds (default 3600)</description>
	</valueHelp>
	<constraint>
	<validator name="numeric" argument="--range 30-86400"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="lifetime">
	<properties>
	<help>ESP lifetime</help>
	<valueHelp>
	<format><30-86400></format>
	<description>IKE lifetime in seconds (default 3600)</description>
	</valueHelp>
	<constraint>
	<validator name="numeric" argument="--range 30-86400"/>
	</constraint>
	</properties>
	</leafNode>
	</children>
	</node>
	<leafNode name="wins-server">
	<properties>
	<help>Windows Internet Name Service (WINS) servers propagated to client</help>
	<valueHelp>
	<format>ipv4</format>
	<description>Domain Name Server (DNS) IPv4 address</description>
	</valueHelp>
	<constraint>
	<validator name="ipv4-address"/>
	</constraint>
	<multi/>
	</properties>
	</leafNode>
	<node name="client-ip-pool">
	<properties>
	<help>Pool of client IP addresses (must be within a /24)</help>
	</properties>
	<children>
	<leafNode name="start">
	<properties>
	<help>First IP address in the pool (will be used as gateway address)</help>
	<constraint>
	<validator name="ipv4-address"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="stop">
	<properties>
	<help>Last IP address in the pool</help>
	<constraint>
	<validator name="ipv4-address"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="subnet">
	<properties>
	<help>Client IP subnet (CIDR notation)</help>
	<constraint>
	<validator name="ipv4-prefix"/>
	</constraint>
	<constraintErrorMessage>Not a valid CIDR formatted prefix</constraintErrorMessage>
	<valueHelp>
	<format>ipv4net</format>
	<description>IPv4 subnet address</description>
	</valueHelp>
	<multi />
	</properties>
	</leafNode>
	</children>
	</node>
	<node name="client-ipv6-pool">
	<properties>
	<help>Pool of client IPv6 addresses</help>
	</properties>
	<children>
	- <leafNode name="prefix">
	+ <tagNode name="prefix">
	<properties>
	- <help>IPV6 prefix delegation</help>
	+ <help>Pool of addresses used to assign to clients</help>
	<valueHelp>
	- <format>ipv6prefix/mask,prefix_len</format>
	- <description>e.g.: fc00:0:1::/48,64 - divides prefix into /64 subnets for clients</description>
	+ <format>ipv6net</format>
	+ <description>IPv6 address and prefix length</description>
	</valueHelp>
	- <multi />
	+ <constraint>
	+ <validator name="ipv6-prefix"/>
	+ </constraint>
	</properties>
	- </leafNode>
	- <leafNode name="delegate-prefix">
	+ <children>
	+ <leafNode name="mask">
	+ <properties>
	+ <help>Prefix length used for individual client</help>
	+ <valueHelp>
	+ <format><48-128></format>
	+ <description>Client prefix length (default: 64)</description>
	+ </valueHelp>
	+ <constraint>
	+ <validator name="numeric" argument="--range 48-128"/>
	+ </constraint>
	+ </properties>
	+ </leafNode>
	+ </children>
	+ </tagNode>
	+ <tagNode name="delegate">
	<properties>
	- <help>DHCPv6 prefix delegation - rfc3633</help>
	+ <help>Subnet used to delegate prefix through DHCPv6-PD (RFC3633)</help>
	<valueHelp>
	- <format>ipv6prefix/mask,prefix_len</format>
	- <description>Delegate to clients through DHCPv6 prefix delegation - rfc3633</description>
	+ <format>ipv6net</format>
	+ <description>IPv6 address and prefix length</description>
	</valueHelp>
	- <multi />
	+ <constraint>
	+ <validator name="ipv6-prefix"/>
	+ </constraint>
	</properties>
	- </leafNode>
	+ <children>
	+ <leafNode name="delegation-prefix">
	+ <properties>
	+ <help>Prefix length delegated to client</help>
	+ <valueHelp>
	+ <format><32-64></format>
	+ <description>Delegated prefix length</description>
	+ </valueHelp>
	+ <constraint>
	+ <validator name="numeric" argument="--range 32-64"/>
	+ </constraint>
	+ </properties>
	+ </leafNode>
	+ </children>
	+ </tagNode>
	</children>
	</node>
	<leafNode name="description">
	<properties>
	<help>Description for L2TP remote-access settings</help>
	</properties>
	</leafNode>
	<leafNode name="dhcp-interface">
	<properties>
	<help>DHCP interface to listen on</help>
	</properties>
	</leafNode>
	<leafNode name="idle">
	<properties>
	<help>PPP idle timeout</help>
	<valueHelp>
	<format><30-86400></format>
	<description>PPP idle timeout in seconds (default 1800)</description>
	</valueHelp>
	<constraint>
	<validator name="numeric" argument="--range 30-86400"/>
	</constraint>
	</properties>
	</leafNode>
	<node name="authentication">
	<properties>
	<help>Authentication for remote access L2TP VPN</help>
	</properties>
	<children>
	<leafNode name="require">
	<properties>
	<help>Authentication protocol for remote access peer L2TP VPN</help>
	<valueHelp>
	<format>pap</format>
	<description>Require the peer to authenticate itself using PAP [Password Authentication Protocol].</description>
	</valueHelp>
	<valueHelp>
	<format>chap</format>
	<description>Require the peer to authenticate itself using CHAP [Challenge Handshake Authentication Protocol].</description>
	</valueHelp>
	<valueHelp>
	<format>mschap</format>
	<description>Require the peer to authenticate itself using CHAP [Challenge Handshake Authentication Protocol].</description>
	</valueHelp>
	<valueHelp>
	<format>mschap-v2</format>
	<description>Require the peer to authenticate itself using MS-CHAPv2 [Microsoft Challenge Handshake Authentication Protocol, Version 2].</description>
	</valueHelp>
	<constraint>
	<regex>(pap\|chap\|mschap\|mschap-v2)</regex>
	</constraint>
	<completionHelp>
	<list>pap chap mschap mschap-v2</list>
	</completionHelp>
	<multi />
	</properties>
	</leafNode>
	<leafNode name="mppe">
	<properties>
	<help>Specifies mppe negotioation preference. (default require mppe 128-bit stateless</help>
	<valueHelp>
	<format>deny</format>
	<description>deny mppe</description>
	</valueHelp>
	<valueHelp>
	<format>prefer</format>
	<description>Ask client for mppe, if it rejects do not fail</description>
	</valueHelp>
	<valueHelp>
	<format>require</format>
	<description>ask client for mppe, if it rejects drop connection</description>
	</valueHelp>
	<constraint>
	<regex>(deny\|prefer\|require)</regex>
	</constraint>
	<completionHelp>
	<list>deny prefer require</list>
	</completionHelp>
	</properties>
	</leafNode>
	<leafNode name="mode">
	<properties>
	<help>Authentication mode for remote access L2TP VPN</help>
	<valueHelp>
	<format>local</format>
	<description>Use local username/password configuration</description>
	</valueHelp>
	<valueHelp>
	<format>radius</format>
	<description>Use a RADIUS server to autenticate users</description>
	</valueHelp>
	<constraint>
	<regex>(local\|radius)</regex>
	</constraint>
	<completionHelp>
	<list>local radius</list>
	</completionHelp>
	</properties>
	</leafNode>
	<node name="local-users">
	<properties>
	<help>Local user authentication for remote access L2TP VPN</help>
	</properties>
	<children>
	<tagNode name="username">
	<properties>
	<help>User name for authentication</help>
	</properties>
	<children>
	<leafNode name="disable">
	<properties>
	<help>Option to disable a L2TP Server user</help>
	<valueless/>
	</properties>
	</leafNode>
	<leafNode name="password">
	<properties>
	<help>Password for authentication</help>
	</properties>
	</leafNode>
	<leafNode name="static-ip">
	<properties>
	<help>Static client IP address</help>
	</properties>
	</leafNode>
	<node name="rate-limit">
	<properties>
	<help>Upload/Download speed limits</help>
	</properties>
	<children>
	<leafNode name="upload">
	<properties>
	<help>Upload bandwidth limit in kbits/sec</help>
	<constraint>
	<validator name="numeric" argument="--range 1-65535"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="download">
	<properties>
	<help>Download bandwidth limit in kbits/sec</help>
	<constraint>
	<validator name="numeric" argument="--range 1-65535"/>
	</constraint>
	</properties>
	</leafNode>
	</children>
	</node>
	</children>
	</tagNode>
	</children>
	</node>
	#include <include/radius-server.xml.i>
	<node name="radius">
	<children>
	<tagNode name="server">
	<children>
	<leafNode name="fail-time">
	<properties>
	<help>Mark server unavailable for <n> seconds on failure</help>
	<valueHelp>
	<format>0-600</format>
	<description>Fail time penalty</description>
	</valueHelp>
	<constraint>
	<validator name="numeric" argument="--range 0-600"/>
	</constraint>
	<constraintErrorMessage>Fail time must be between 0 and 600 seconds</constraintErrorMessage>
	</properties>
	</leafNode>
	</children>
	</tagNode>
	<leafNode name="timeout">
	<properties>
	<help>Timeout to wait response from server (seconds)</help>
	</properties>
	</leafNode>
	<leafNode name="acct-timeout">
	<properties>
	<help>Timeout to wait reply for Interim-Update packets. (default 3 seconds)</help>
	</properties>
	</leafNode>
	<leafNode name="max-try">
	<properties>
	<help>Maximum number of tries to send Access-Request/Accounting-Request queries</help>
	</properties>
	</leafNode>
	<leafNode name="nas-identifier">
	<properties>
	<help>Value to send to RADIUS server in NAS-Identifier attribute and to be matched in DM/CoA requests.</help>
	</properties>
	</leafNode>
	<node name="dae-server">
	<properties>
	<help>IPv4 address and port to bind Dynamic Authorization Extension server (DM/CoA)</help>
	</properties>
	<children>
	<leafNode name="ip-address">
	<properties>
	<help>IP address for Dynamic Authorization Extension server (DM/CoA)</help>
	</properties>
	</leafNode>
	<leafNode name="port">
	<properties>
	<help>Port for Dynamic Authorization Extension server (DM/CoA)</help>
	</properties>
	</leafNode>
	<leafNode name="secret">
	<properties>
	<help>Secret for Dynamic Authorization Extension server (DM/CoA)</help>
	</properties>
	</leafNode>
	</children>
	</node>
	<node name="rate-limit">
	<properties>
	<help>Upload/Download speed limits</help>
	</properties>
	<children>
	<leafNode name="attribute">
	<properties>
	<help>Specifies which radius attribute contains rate information. (default is Filter-Id)</help>
	</properties>
	</leafNode>
	<leafNode name="vendor">
	<properties>
	<help>Specifies the vendor dictionary. (dictionary needs to be in /usr/share/accel-ppp/radius)</help>
	</properties>
	</leafNode>
	<leafNode name="enable">
	<properties>
	<help>Enables Bandwidth shaping via RADIUS</help>
	<valueless />
	</properties>
	</leafNode>
	</children>
	</node>
	</children>
	</node>
	</children>
	</node>
	<node name="ppp-options">
	<properties>
	<help>Advanced protocol options</help>
	</properties>
	<children>
	<leafNode name="lcp-echo-interval">
	<properties>
	<help>LCP echo-requests/sec</help>
	<constraint>
	<validator name="numeric" argument="--positive"/>
	</constraint>
	</properties>
	</leafNode>
	<leafNode name="lcp-echo-failure">
	<properties>
	<help>Maximum number of Echo-Requests may be sent without valid reply</help>
	<constraint>
	<validator name="numeric" argument="--positive"/>
	</constraint>
	</properties>
	</leafNode>
	</children>
	</node>
	</children>
	</node>
	</children>
	</node>
	</children>
	</node>
	</interfaceDefinition>
	diff --git a/src/conf_mode/vpn_l2tp.py b/src/conf_mode/vpn_l2tp.py
	index 08654e2ff..7cfb4e74e 100755
	--- a/src/conf_mode/vpn_l2tp.py
	+++ b/src/conf_mode/vpn_l2tp.py
	@@ -1,372 +1,394 @@
	#!/usr/bin/env python3
	#
	# Copyright (C) 2019-2020 VyOS maintainers and contributors
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License version 2 or later as
	# published by the Free Software Foundation.
	#
	# 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. If not, see <http://www.gnu.org/licenses/>.

	import os
	import re

	from copy import deepcopy
	from stat import S_IRUSR, S_IWUSR, S_IRGRP
	from sys import exit
	from time import sleep

	from ipaddress import ip_network
	from jinja2 import FileSystemLoader, Environment

	from vyos.config import Config
	from vyos.defaults import directories as vyos_data_dir
	from vyos.util import call
	from vyos.validate import is_ipv4
	from vyos import ConfigError

	l2tp_conf = '/etc/accel-ppp/l2tp.conf'
	l2tp_chap_secrets = '/etc/accel-ppp/l2tp.chap-secrets'

	default_config_data = {
	'auth_mode': 'local',
	'auth_ppp_mppe': 'prefer',
	'auth_proto': ['auth_mschap_v2'],
	'chap_secrets_file': l2tp_chap_secrets, # used in Jinja2 template
	'client_ip_pool': None,
	'client_ip_subnets': [],
	'client_ipv6_pool': [],
	'client_ipv6_delegate_prefix': [],
	'dnsv4': [],
	'dnsv6': [],
	'gateway_address': '10.255.255.0',
	'local_users' : [],
	'mtu': '1436',
	'outside_addr': '',
	'ppp_mppe': 'prefer',
	'ppp_echo_failure' : '3',
	'ppp_echo_interval' : '30',
	'ppp_echo_timeout': '0',
	'radius_server': [],
	'radius_acct_tmo': '3',
	'radius_max_try': '3',
	'radius_timeout': '3',
	'radius_nas_id': '',
	'radius_nas_ip': '',
	'radius_source_address': '',
	'radius_shaper_attr': '',
	'radius_shaper_vendor': '',
	'radius_dynamic_author': '',
	'wins': [],
	'ip6_column': [],
	'thread_cnt': 1
	}

	def get_config():
	conf = Config()
	base_path = ['vpn', 'l2tp', 'remote-access']
	if not conf.exists(base_path):
	return None

	conf.set_level(base_path)
	l2tp = deepcopy(default_config_data)

	cpu = os.cpu_count()
	if cpu > 1:
	l2tp['thread_cnt'] = int(cpu/2)

	### general options ###
	if conf.exists(['name-server']):
	for name_server in conf.return_values(['name-server']):
	if is_ipv4(name_server):
	l2tp['dnsv4'].append(name_server)
	else:
	l2tp['dnsv6'].append(name_server)

	if conf.exists(['wins-server']):
	l2tp['wins'] = conf.return_values(['wins-server'])

	if conf.exists('outside-address'):
	l2tp['outside_addr'] = conf.return_value('outside-address')

	if conf.exists(['authentication', 'mode']):
	l2tp['auth_mode'] = conf.return_value(['authentication', 'mode'])

	if conf.exists(['authentication', 'protocols']):
	auth_mods = {
	'pap': 'auth_pap',
	'chap': 'auth_chap_md5',
	'mschap': 'auth_mschap_v1',
	'mschap-v2': 'auth_mschap_v2'
	}

	for proto in conf.return_values(['authentication', 'protocols']):
	l2tp['auth_proto'].append(auth_mods[proto])

	if conf.exists(['authentication', 'mppe']):
	l2tp['auth_ppp_mppe'] = conf.return_value(['authentication', 'mppe'])

	#
	# local auth
	if conf.exists(['authentication', 'local-users']):
	for username in conf.list_nodes(['authentication', 'local-users', 'username']):
	user = {
	'name' : username,
	'password' : '',
	'state' : 'enabled',
	'ip' : '*',
	'upload' : None,
	'download' : None
	}

	conf.set_level(base_path + ['authentication', 'local-users', 'username', username])

	if conf.exists(['password']):
	user['password'] = conf.return_value(['password'])

	if conf.exists(['disable']):
	user['state'] = 'disable'

	if conf.exists(['static-ip']):
	user['ip'] = conf.return_value(['static-ip'])

	if conf.exists(['rate-limit', 'download']):
	user['download'] = conf.return_value(['rate-limit', 'download'])

	if conf.exists(['rate-limit', 'upload']):
	user['upload'] = conf.return_value(['rate-limit', 'upload'])

	l2tp['local_users'].append(user)

	#
	# RADIUS auth and settings
	conf.set_level(base_path + ['authentication', 'radius'])
	if conf.exists(['server']):
	for server in conf.list_nodes(['server']):
	radius = {
	'server' : server,
	'key' : '',
	'fail_time' : 0,
	'port' : '1812'
	}

	conf.set_level(base_path + ['authentication', 'radius', 'server', server])

	if conf.exists(['fail-time']):
	radius['fail-time'] = conf.return_value(['fail-time'])

	if conf.exists(['port']):
	radius['port'] = conf.return_value(['port'])

	if conf.exists(['key']):
	radius['key'] = conf.return_value(['key'])

	if not conf.exists(['disable']):
	l2tp['radius_server'].append(radius)

	#
	# advanced radius-setting
	conf.set_level(base_path + ['authentication', 'radius'])

	if conf.exists(['acct-timeout']):
	l2tp['radius_acct_tmo'] = conf.return_value(['acct-timeout'])

	if conf.exists(['max-try']):
	l2tp['radius_max_try'] = conf.return_value(['max-try'])

	if conf.exists(['timeout']):
	l2tp['radius_timeout'] = conf.return_value(['timeout'])

	if conf.exists(['nas-identifier']):
	l2tp['radius_nas_id'] = conf.return_value(['nas-identifier'])

	if conf.exists(['nas-ip-address']):
	l2tp['radius_nas_ip'] = conf.return_value(['nas-ip-address'])

	if conf.exists(['source-address']):
	l2tp['radius_source_address'] = conf.return_value(['source-address'])

	# Dynamic Authorization Extensions (DOA)/Change Of Authentication (COA)
	if conf.exists(['dynamic-author']):
	dae = {
	'port' : '',
	'server' : '',
	'key' : ''
	}

	if conf.exists(['dynamic-author', 'server']):
	dae['server'] = conf.return_value(['dynamic-author', 'server'])

	if conf.exists(['dynamic-author', 'port']):
	dae['port'] = conf.return_value(['dynamic-author', 'port'])

	if conf.exists(['dynamic-author', 'key']):
	dae['key'] = conf.return_value(['dynamic-author', 'key'])

	l2tp['radius_dynamic_author'] = dae

	if conf.exists(['rate-limit', 'enable']):
	l2tp['radius_shaper_attr'] = 'Filter-Id'
	c_attr = ['rate-limit', 'enable', 'attribute']
	if conf.exists(c_attr):
	l2tp['radius_shaper_attr'] = conf.return_value(c_attr)

	c_vendor = ['rate-limit', 'enable', 'vendor']
	if conf.exists(c_vendor):
	l2tp['radius_shaper_vendor'] = conf.return_value(c_vendor)

	conf.set_level(base_path)
	if conf.exists(['client-ip-pool']):
	if conf.exists(['client-ip-pool', 'start']) and conf.exists(['client-ip-pool', 'stop']):
	start = conf.return_value(['client-ip-pool', 'start'])
	stop = conf.return_value(['client-ip-pool', 'stop'])
	l2tp['client_ip_pool'] = start + '-' + re.search('[0-9]+$', stop).group(0)

	if conf.exists(['client-ip-pool', 'subnet']):
	l2tp['client_ip_subnets'] = conf.return_values(['client-ip-pool', 'subnet'])

	if conf.exists(['client-ipv6-pool', 'prefix']):
	- l2tp['client_ipv6_pool'] = conf.return_values(['client-ipv6-pool', 'prefix'])
	l2tp['ip6_column'].append('ip6')
	+ for prefix in conf.list_nodes(['client-ipv6-pool', 'prefix']):
	+ tmp = {
	+ 'prefix': prefix,
	+ 'mask': '64'
	+ }
	+
	+ if conf.exists(['client-ipv6-pool', 'prefix', prefix, 'mask']):
	+ tmp['mask'] = conf.return_value(['client-ipv6-pool', 'prefix', prefix, 'mask'])

	- if conf.exists(['client-ipv6-pool', 'delegate-prefix']):
	- l2tp['client_ipv6_delegate_prefix'] = conf.return_values(['client-ipv6-pool', 'delegate-prefix'])
	- l2tp['ip6_column'].append('ip6-dp')
	+ l2tp['client_ipv6_pool'].append(tmp)
	+
	+ if conf.exists(['client-ipv6-pool', 'delegate']):
	+ l2tp['ip6_column'].append('ip6-db')
	+ for prefix in conf.list_nodes(['client-ipv6-pool', 'delegate']):
	+ tmp = {
	+ 'prefix': prefix,
	+ 'mask': ''
	+ }
	+
	+ if conf.exists(['client-ipv6-pool', 'delegate', prefix, 'mask']):
	+ tmp['mask'] = conf.return_value(['client-ipv6-pool', 'delegate', prefix, 'delegation-prefix'])
	+
	+ l2tp['client_ipv6_delegate_prefix'].append(tmp)

	if conf.exists(['mtu']):
	l2tp['mtu'] = conf.return_value(['mtu'])

	# gateway address
	if conf.exists(['gateway-address']):
	l2tp['gateway_address'] = conf.return_value(['gateway-address'])
	else:
	# calculate gw-ip-address
	if conf.exists(['client-ip-pool', 'start']):
	# use start ip as gw-ip-address
	l2tp['gateway_address'] = conf.return_value(['client-ip-pool', 'start'])

	elif conf.exists(['client-ip-pool', 'subnet']):
	# use first ip address from first defined pool
	subnet = conf.return_values(['client-ip-pool', 'subnet'])[0]
	subnet = ip_network(subnet)
	l2tp['gateway_address'] = str(list(subnet.hosts())[0])

	# LNS secret
	if conf.exists(['lns', 'shared-secret']):
	l2tp['lns_shared_secret'] = conf.return_value(['lns', 'shared-secret'])

	if conf.exists(['ccp-disable']):
	l2tp[['ccp_disable']] = True

	# PPP options
	if conf.exists(['idle']):
	l2tp['ppp_echo_timeout'] = conf.return_value(['idle'])

	if conf.exists(['ppp-options', 'lcp-echo-failure']):
	l2tp['ppp_echo_failure'] = conf.return_value(['ppp-options', 'lcp-echo-failure'])

	if conf.exists(['ppp-options', 'lcp-echo-interval']):
	l2tp['ppp_echo_interval'] = conf.return_value(['ppp-options', 'lcp-echo-interval'])

	return l2tp


	def verify(l2tp):
	if not l2tp:
	return None

	if l2tp['auth_mode'] == 'local':
	if not l2tp['local_users']:
	raise ConfigError('L2TP local auth mode requires local users to be configured!')

	for user in l2tp['local_users']:
	if not user['password']:
	raise ConfigError(f"Password required for user {user['name']}")

	elif l2tp['auth_mode'] == 'radius':
	if len(l2tp['radius_server']) == 0:
	raise ConfigError("RADIUS authentication requires at least one server")

	for radius in l2tp['radius_server']:
	if not radius['key']:
	raise ConfigError(f"Missing RADIUS secret for server {{ radius['key'] }}")

	# check for the existence of a client ip pool
	if not (l2tp['client_ip_pool'] or l2tp['client_ip_subnets']):
	raise ConfigError(
	"set vpn l2tp remote-access client-ip-pool requires subnet or start/stop IP pool")

	# check ipv6
	if l2tp['client_ipv6_delegate_prefix'] and not l2tp['client_ipv6_pool']:
	raise ConfigError('IPv6 prefix delegation requires client-ipv6-pool prefix')

	+ for prefix in l2tp['client_ipv6_delegate_prefix']:
	+ if not prefix['mask']:
	+ raise ConfigError('Delegation-prefix required for individual delegated networks')
	+
	if len(l2tp['wins']) > 2:
	raise ConfigError('Not more then two IPv4 WINS name-servers can be configured')

	if len(l2tp['dnsv4']) > 2:
	raise ConfigError('Not more then two IPv4 DNS name-servers can be configured')

	if len(l2tp['dnsv6']) > 3:
	raise ConfigError('Not more then three IPv6 DNS name-servers can be configured')

	return None


	def generate(l2tp):
	if not l2tp:
	return None

	# Prepare Jinja2 template loader from files
	tmpl_path = os.path.join(vyos_data_dir['data'], 'templates', 'l2tp')
	fs_loader = FileSystemLoader(tmpl_path)
	env = Environment(loader=fs_loader, trim_blocks=True)

	tmpl = env.get_template('l2tp.config.tmpl')
	config_text = tmpl.render(c)
	with open(l2tp_conf, 'w') as f:
	f.write(config_text)

	if l2tp['auth_mode'] == 'local':
	tmpl = env.get_template('chap-secrets.tmpl')
	config_text = tmpl.render(l2tp)
	with open(l2tp_chap_secrets, 'w') as f:
	f.write(config_text)

	os.chmod(l2tp_chap_secrets, S_IRUSR \| S_IWUSR \| S_IRGRP)

	else:
	if os.path.exists(l2tp_chap_secrets):
	os.unlink(l2tp_chap_secrets)

	return None


	def apply(l2tp):
	if not l2tp:
	call('systemctl stop accel-ppp-l2tp.service')

	if os.path.exists(l2tp_conf):
	os.unlink(l2tp_conf)

	if os.path.exists(l2tp_chap_secrets):
	os.unlink(l2tp_chap_secrets)

	return None

	call('systemctl restart accel-ppp-l2tp.service')

	if __name__ == '__main__':
	try:
	c = get_config()
	verify(c)
	generate(c)
	apply(c)
	except ConfigError as e:
	print(e)
	exit(1)
	diff --git a/src/migration-scripts/l2tp/2-to-3 b/src/migration-scripts/l2tp/2-to-3
	index e24d1ffa9..bd0839e03 100755
	--- a/src/migration-scripts/l2tp/2-to-3
	+++ b/src/migration-scripts/l2tp/2-to-3
	@@ -1,83 +1,111 @@
	#!/usr/bin/env python3
	#
	# Copyright (C) 2020 VyOS maintainers and contributors
	#
	# This program is free software; you can redistribute it and/or modify
	# it under the terms of the GNU General Public License version 2 or later as
	# published by the Free Software Foundation.
	#
	# 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. If not, see <http://www.gnu.org/licenses/>.

	# - remove primary/secondary identifier from nameserver
	# - TODO: remove radius server req-limit

	import os
	import sys

	from sys import argv, exit
	from vyos.configtree import ConfigTree

	if (len(argv) < 1):
	print("Must specify file name!")
	exit(1)

	file_name = argv[1]

	with open(file_name, 'r') as f:
	config_file = f.read()

	config = ConfigTree(config_file)
	base = ['vpn', 'l2tp', 'remote-access']
	if not config.exists(base):
	# Nothing to do
	exit(0)
	else:

	# Migrate IPv4 DNS servers
	dns_base = base + ['dns-servers']
	if config.exists(dns_base):
	for server in ['server-1', 'server-2']:
	if config.exists(dns_base + [server]):
	dns = config.return_value(dns_base + [server])
	config.set(base + ['name-server'], value=dns, replace=False)

	config.delete(dns_base)

	# Migrate IPv6 DNS servers
	dns_base = base + ['dnsv6-servers']
	if config.exists(dns_base):
	for server in config.return_values(dns_base):
	config.set(base + ['name-server'], value=server, replace=False)

	config.delete(dns_base)

	# Migrate IPv4 WINS servers
	wins_base = base + ['wins-servers']
	if config.exists(wins_base):
	for server in ['server-1', 'server-2']:
	if config.exists(wins_base + [server]):
	wins = config.return_value(wins_base + [server])
	config.set(base + ['wins-server'], value=wins, replace=False)

	config.delete(wins_base)


	# Remove RADIUS server req-limit node
	radius_base = base + ['authentication', 'radius']
	if config.exists(radius_base):
	for server in config.list_nodes(radius_base + ['server']):
	if config.exists(radius_base + ['server', server, 'req-limit']):
	config.delete(radius_base + ['server', server, 'req-limit'])

	+ # Migrate IPv6 prefixes
	+ ipv6_base = base + ['client-ipv6-pool']
	+ if config.exists(ipv6_base + ['prefix']):
	+ prefix_old = config.return_values(ipv6_base + ['prefix'])
	+ # delete old prefix CLI nodes
	+ config.delete(ipv6_base + ['prefix'])
	+ # create ned prefix tag node
	+ config.set(ipv6_base + ['prefix'])
	+ config.set_tag(ipv6_base + ['prefix'])
	+
	+ for p in prefix_old:
	+ prefix = p.split(',')[0]
	+ mask = p.split(',')[1]
	+ config.set(ipv6_base + ['prefix', prefix, 'mask'], value=mask)
	+
	+ if config.exists(ipv6_base + ['delegate-prefix']):
	+ prefix_old = config.return_values(ipv6_base + ['delegate-prefix'])
	+ # delete old delegate prefix CLI nodes
	+ config.delete(ipv6_base + ['delegate-prefix'])
	+ # create ned delegation tag node
	+ config.set(ipv6_base + ['delegate '])
	+ config.set_tag(ipv6_base + ['delegate '])
	+
	+ for p in prefix_old:
	+ prefix = p.split(',')[0]
	+ mask = p.split(',')[1]
	+ config.set(ipv6_base + ['delegate', prefix, 'mask'], value=mask)
	+
	try:
	with open(file_name, 'w') as f:
	f.write(config.to_string())
	except OSError as e:
	print("Failed to save the modified config: {}".format(e))
	exit(1)

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