Provided by: l2tpns_2.1.21-1.1build1_amd64 bug


       startup-config - configuration file for l2tpns




       startup-config is the configuration file for l2tpns.

       The  format  is  plain  text,  in the same format as accepted by the configuration mode of
       l2tpns's telnet administrative interface.  Comments are indicated by either the  character
       # or !.

       Settings are specified with

              set variable value

       The following variables may be set:

              debug  Set  the  level  of  debugging  messages written to the log file.  The value
                     should be between 0 and 5, with 0  being  no  debugging,  and  5  being  the

                     This  will  be  where  all  logging and debugging information is written to.
                     This may be either a  filename,  such  as  /var/log/l2tpns,  or  the  string
                     syslog:facility, where facility is any one of the syslog logging facilities,
                     such as local5.

                     If set, the process id will be written to the  specified  file.   The  value
                     must be an absolute path.

                     Path to random data source (default /dev/urandom).  Use "" to use the rand()
                     library function.

                     The secret used by l2tpns for authenticating tunnel request.   Must  be  the
                     same  as the LAC, or authentication will fail.  Only actually be used if the
                     LAC requests authentication.

                     MTU of interface for L2TP traffic (default: 1500).  Used to set link MRU and
                     adjust TCP MSS.

                     Restart timer for PPP protocol negotiation in seconds (default: 3).

                     Number of configure requests to send before giving up (default: 10).

                     Number  of  Configure-Nak requests to send before sending a Configure-Reject
                     (default: 5).

              primary_dns, secondary_dns
                     Whenever a PPP connection is established, DNS servers will be  sent  to  the
                     user,  both  a  primary  and a secondary.  If either is set to, then
                     that one will not be sent.

              primary_radius, secondary_radius
                     Sets the RADIUS servers used for both authentication and accounting.  If the
                     primary  server  does  not respond, then the secondary RADIUS server will be

              primary_radius_port, secondary_radius_port
                     Sets the authentication ports for the primary and secondary RADIUS  servers.
                     The  accounting  port is one more than the authentication port.  If no ports
                     are given, authentication defaults to 1645, and accounting to 1646.

                     If set to true, then RADIUS accounting packets will be sent.  A Start record
                     will  be  sent  when  the  session is successfully authenticated, and a Stop
                     record when the session is closed.

                     If radius_accounting is on, defines the interval between sending  of  RADIUS
                     interim accounting records (in seconds).

                     Secret to be used in RADIUS packets.

                     A  comma separated list of supported RADIUS authentication methods ("pap" or
                     "chap"), in order of preference (default "pap").

                     Port for DAE RADIUS (Packet of Death/Disconnect,  Change  of  Authorization)
                     requests (default: 3799).

                     Allow  multiple  logins with the same username.  If false (the default), any
                     prior session with the same username will be dropped when a new  session  is

                     When  the  tun  interface  is  created, it is assigned the address specified
                     here.  If no address is given, is  used.   Packets  containing  user
                     traffic  should  be  routed via this address if given, otherwise the primary
                     address of the machine.

                     Address to send to clients as the default gateway.

                     Determines whether or not to send a gratuitous ARP for the bind_address when
                     the  server  is  ready  to  handle traffic (default: true).  This setting is
                     ignored if BGP is configured.

                     Sets the default speed (in kbits/s) which sessions will be limited to.

                     Number of token buckets to allocate for throttling.  Each throttled  session
                     requires two buckets (in and out).

                     If  set  to  a  directory,  then every 5 minutes the current usage for every
                     connected use will be dumped to a file in this directory.

              setuid After starting up and binding the  interface,  change  UID  to  this.   This
                     doesn't work properly.

                     If  set to true, then the current bandwidth utilization will be logged every
                     second.  Even if this is disabled, you can see this information  by  running
                     the uptime command on the CLI.

                     Number  of  packets to read off each of the UDP and TUN fds when returned as
                     readable by select (default: 10).  Avoids incurring the  unnecessary  system
                     call overhead of select on busy servers.

                     Sets  the  scheduling  policy  for  the  l2tpns process to SCHED_FIFO.  This
                     causes the kernel to immediately preempt any currently  running  SCHED_OTHER
                     (normal) process in favour of l2tpns when it becomes runnable.
                     Ignored on uniprocessor systems.

                     Keep all pages mapped by the l2tpns process in memory.

                     Maximum number of host unreachable ICMP packets to send per second.

                     Maximum  number of packets of downstream traffic to be handled each tenth of
                     a second per session.  If zero, no limit is applied (default: 0).   Intended
                     as  a DoS prevention mechanism and not a general throttling control (packets
                     are dropped, not queued).

                     Multicast cluster address (default:

                     Interface for cluster packets (default: eth0).

                     TTL for multicast packets (default: 1).

                     Interval in tenths of a second between cluster heartbeat/pings.

                     Cluster heartbeat timeout in tenths of a  second.   A  new  master  will  be
                     elected  when  this interval has been passed without seeing a heartbeat from
                     the master.

                     Determines the minumum number of up  to  date  slaves  required  before  the
                     master will drop routes (default: 1).

                     Enable  negotiation of IPv6.  This forms the the first 64 bits of the client
                     allocated address.  The remaining 64 come from the  allocated  IPv4  address
                     and 4 bytes of 0s.

       The routing configuration section is entered by the command

              router bgp as

       where as specifies the local AS number.

       Subsequent  lines  prefixed  with neighbour peer define the attributes of BGP neighhbours.
       Valid commands are:

              neighbour peer remote-as as
              neighbour peer timers keepalive hold

       Where peer specifies the BGP neighbour as either a hostname  or  IP  address,  as  is  the
       remote AS number and keepalive, hold are the timer values in seconds.

       Named access lists may be defined with either of

              ip access-list standard name
              ip access-list extended name

       Subsequent lines starting with permit or deny define the body of the access-list.

       Standard Access Lists
           Standard access lists are defined with:

                  {permit|deny} source [dest]

           Where source and dest specify IP matches using one of:

                  address wildard
                  host address

           address  and  wildard  are in dotted-quad notation, bits in the wildard indicate which
           address bits in address are relevant to the match (0 = exact match; 1 = don't care).

           The shorthand 'host address' is equivalent to 'address';  'any'  to  '

       Extended Access Lists
           Extended access lists are defined with:

                  {permit|deny} proto source [ports] dest [ports] [flags]

           Where  proto  is one of ip, tcp or udp, and source and dest are as described above for
           standard lists.

           For TCP and UDP matches, source and destination may be optionally followed by a  ports

                  {eq|neq|gt|lt} port
                  range from to

           flags may be one of:

                  {match-any|match-all} {+|-}{fin|syn|rst|psh|ack|urg} ...
                         Match packets with any or all of the tcp flags set (+) or clear (-).

                         Match  "established"  TCP connections:  packets with RST or ACK set, and
                         SYN clear.

                         Match IP fragments.  May not be specified on rules with layer 4 matches.