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<?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>
              <node name="dns-servers">
                <properties>
                  <help>IPv4 Domain Name Service (DNS) server</help>
                </properties>
                <children>
                  <leafNode name="server-1">
                    <properties>
                      <help>Primary DNS server</help>
                      <valueHelp>
                        <format>ipv4</format>
                        <description>IPv4 address</description>
                      </valueHelp>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                  <leafNode name="server-2">
                    <properties>
                      <help>Secondary DNS server</help>
                      <valueHelp>
                        <format>ipv4</format>
                        <description>IPv4 address</description>
                      </valueHelp>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node>
              <leafNode name="dnsv6-servers">
                <properties>
                  <help>IPv6 Domain Name Service (DNS) server</help>
                  <valueHelp>
                  <format>ipv6</format>
                    <description>IPv6 DNS address</description>
                  </valueHelp>
                  <constraint>
                    <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>&lt;text&gt;</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>&lt;text&gt;</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>&lt;text&gt;</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>&lt;text&gt;</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>&lt;30-86400&gt;</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>&lt;30-86400&gt;</format>
                        <description>IKE lifetime in seconds (default 3600)</description>
                      </valueHelp>
                      <constraint>
                        <validator name="numeric" argument="--range 30-86400"/>
                      </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node>
              <node name="wins-servers">
                <properties>
                  <help>Windows Internet Name Service (WINS) server settings</help>
                </properties>
                <children>
                  <leafNode name="server-1">
                    <properties>
                      <help>Primary WINS server</help>
                      <constraint>
                        <validator name="ipv4-address"/>
                      </constraint>
                    </properties>
                  </leafNode>
                  <leafNode name="server-2">
                    <properties>
                      <help>Secondary WINS server</help>
                    <constraint>
                      <validator name="ipv4-address"/>
                    </constraint>
                    </properties>
                  </leafNode>
                </children>
              </node>
              <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">
                    <properties>
                      <help>IPV6 prefix delegation</help>
                      <valueHelp>
                        <format>ipv6prefix/mask,prefix_len</format>
                        <description>e.g.: fc00:0:1::/48,64 - divides prefix into /64 subnets for clients</description>
                      </valueHelp>
                      <multi />
                    </properties>
                  </leafNode>
                  <leafNode name="delegate-prefix">
                    <properties>
                      <help>DHCPv6 prefix delegation - rfc3633</help>
                      <valueHelp>
                        <format>ipv6prefix/mask,prefix_len</format>
                        <description>Delegate to clients through DHCPv6 prefix delegation - rfc3633</description>
                      </valueHelp>
                      <multi />
                    </properties>
                  </leafNode>
                </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>&lt;30-86400&gt;</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>
                  <node name="radius">
                    <properties>
                      <help>RADIUS specific configuration</help>
                    </properties>
                    <children>
                      <tagNode name="server">
                        <properties>
                          <help>IP address of RADIUS server</help>
                          <valueHelp>
                            <format>ipv4</format>
                            <description>IPv4 address of RADIUS server</description>
                          </valueHelp>
                        </properties>
                        <children>
                          <leafNode name="key">
                            <properties>
                              <help>Key for accessing the specified server</help>
                            </properties>
                          </leafNode>
                          <leafNode name="req-limit">
                            <properties>
                              <help>Maximum number of simultaneous requests to server (default: unlimited)</help>
                            </properties>
                          </leafNode>
                          <leafNode name="fail-time">
                            <properties>
                              <help>If server doesn not responds mark it unavailable for this time (seconds)</help>
                            </properties>
                          </leafNode>
                        </children>
                      </tagNode>
                      <leafNode name="source-address">
                        <properties>
                          <help>Local RADIUS client address from which packets are sent.</help>
                          <valueHelp>
                            <format>&lt;x.x.x.x&gt;</format>
                            <description>Local RADIUS client address from which packets are sent</description>
                          </valueHelp>
                        </properties>
                      </leafNode>
                      <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>