X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/bb63cb999417e2fea8e70e498b8f8eb97a0edd80..42af131396ce5cd22eacbae64dfefd742aefa6a0:/Docs/manual.html diff --git a/Docs/manual.html b/Docs/manual.html index 8dd2532..d09e667 100644 --- a/Docs/manual.html +++ b/Docs/manual.html @@ -56,6 +56,7 @@ H3 {
  • Filtering
  • Clustering
  • Routing
    • +
  • Avoiding Fragmentation
  • Performance
    • @@ -184,6 +185,18 @@ the same as the LAC, or authentication will fail. Only actually be used if the LAC requests authentication. +
  • l2tp_mtu (int)
    +MTU of interface for L2TP traffic (default: 1500). Used to set link +MRU and adjust TCP MSS. +
    • + +
  • ppp_restart_time (int)
    +ppp_max_configure (int)
    +ppp_max_failure (int)
    +PPP counter and timer values, as described in §4.1 of +RFC1661. +
    • +
  • primary_dns (ip address)
  • secondary_dns (ip address)
    Whenever a PPP connection is established, DNS servers will be sent to the @@ -191,14 +204,6 @@ user, both a primary and a secondary. If either is set to 0.0.0.0, then that one will not be sent.
    • -
  • save_state (boolean)
    -When l2tpns receives a STGTERM it will write out its current -ip_address_pool, session and tunnel tables to disk prior to exiting to -be re-loaded at startup. The validity of this data is obviously quite -short and the intent is to allow an sessions to be retained over a -software upgrade. -
    • -
  • primary_radius (ip address)
  • secondary_radius (ip address)
    Sets the RADIUS servers used for both authentication and accounting. @@ -231,6 +236,22 @@ This secret will be used in all RADIUS queries. If this is not set then RADIUS queries will fail.
    • +
  • radius_authtypes (string)
    +A comma separated list of supported RADIUS authentication methods +(pap or chap), in order of preference (default pap). +
    • + +
  • radius_dae_port (short)
    +Port for DAE RADIUS (Packet of Death/Disconnect, Change of Authorization) +requests (default: 3799). +
    • + +
  • allow_duplicate_users (boolean)
    +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 established. +
    • +
  • bind_address (ip address)
    When the tun interface is created, it is assigned the address specified here. If no address is given, 1.1.1.1 is used. Packets @@ -282,10 +303,6 @@ second. Even if this is disabled, you can see this information by running the uptime command on the CLI.
    • -
  • cleanup_interval (int)
    -Interval between regular cleanups (in seconds). -
    • -
  • multi_read_count (int)
    Number of packets to read off each of the UDP and TUN fds when returned as readable by select (default: 10). Avoids incurring the @@ -323,6 +340,10 @@ on Clustering for more information. Interface for cluster packets (default: eth0).
    • +
  • cluster_mcast_ttl (int)
    +TTL for multicast packets (default: 1). +
    • +
  • cluster_hb_interval (int)
    Interval in tenths of a second between cluster heartbeat/pings.
    • @@ -332,6 +353,11 @@ 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. + +
  • cluster_master_min_adv (int)
    +Determines the minumum number of up to date slaves required before the +master will drop routes (default: 1). +

    • BGP routing configuration is entered by the command: @@ -691,16 +717,15 @@ killall -HUP l2tpns The signals understood are: -

    +
    +
    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.
    +

    Throttling

    @@ -813,14 +838,14 @@ supplied structure: some way. - +
    +
    t
    Tunnel +
    s
    Session +
    username +
    password +
    protocol
    0xC023 for PAP, 0xC223 for CHAP +
    continue_auth
    Set to 0 to stop processing authentication modules +
    post_auth @@ -830,16 +855,16 @@ supplied structure: to be accepted. - + allow or disallow authentication +
    protocol
    0xC023 for PAP, 0xC223 for CHAP + packet_rx @@ -848,12 +873,12 @@ supplied structure: seriously slow down the system. - +
    +
    t
    Tunnel +
    s
    Session +
    buf
    The raw packet data +
    len
    The length of buf +
    packet_tx @@ -862,12 +887,12 @@ supplied structure: seriously slow down the system. - +
    +
    t
    Tunnel +
    s
    Session +
    buf
    The raw packet data +
    len
    The length of buf +
    timer @@ -876,9 +901,9 @@ supplied structure: you do is reentrant. - +
    +
    time_now
    The current unix timestamp +
    new_session @@ -886,10 +911,10 @@ supplied structure: session is now ready to handle traffic. - +
    +
    t
    Tunnel +
    s
    Session +
    kill_session @@ -897,10 +922,10 @@ supplied structure: This may be called multiple times for the same session. - +
    +
    t
    Tunnel +
    s
    Session +
    radius_response @@ -910,12 +935,24 @@ supplied structure: modules. - +
    +
    t
    Tunnel +
    s
    Session +
    key +
    value +
    + + + radius_reset + This is called whenever a RADIUS CoA request is + received to reset any options to default values before + the new values are applied. + + +
    +
    t
    Tunnel +
    s
    Session +
    control @@ -924,21 +961,13 @@ supplied structure: required. - +
    +
    iam_master
    Cluster master status +
    argc
    The number of arguments +
    argv
    Arguments +
    response
    Return value: NSCTL_RES_OK or NSCTL_RES_ERR +
    additional
    Extended response text +
    @@ -1030,6 +1059,22 @@ ibgp" for IBGP. If this is not supported by your IOS revision, you can use "maximum-paths" (which works for EBGP) and set as_number to a private value such as 64512.

    +

    Avoiding Fragmentation

    + +Fragmentation of encapsulated return packets to the LAC may be avoided +for TCP sessions by adding a firewall rule to clamps the MSS on +outgoing SYN packets. + +The following is appropriate for interfaces with a typical MTU of +1500: + +
    +iptables -A FORWARD -i tun+ -o eth0 	\
+    -p tcp --tcp-flags SYN,RST SYN	\
+    -m tcpmss --mss 1413:1600		\
+    -j TCPMSS --set-mss 1412
+
    +

    Performance

    Performance is great.