<LI><A HREF="#Filtering">Filtering</A></LI>
<LI><A HREF="#Clustering">Clustering</A></LI>
<LI><A HREF="#Routing">Routing</A></LI>
- <LI><A HREF="#AvoidingFragmentation">Avoiding Fragmentation</A></LI>
<LI><A HREF="#Performance">Performance</A></LI>
</OL>
<H2 ID="Overview">Overview</H2>
-l2tpns is half of a complete L2TP implementation. It supports only the
-
LNS side of the connection.<P>
+l2tpns a complete L2TP implementation. It supports the LAC, LNS and
L2TP (Layer 2 Tunneling Protocol) is designed to allow any layer 2
protocol (e.g. Ethernet, PPP) to be tunneled over an IP connection. l2tpns
used if the LAC requests authentication.
</LI>
+<LI><B>l2tp_mtu</B> (int)<BR>
+MTU of interface for L2TP traffic (default: 1500). Used to set link
+MRU and adjust TCP MSS.
+</LI>
+
+<LI><B>ppp_restart_time</B> (int)<BR>
+<B>ppp_max_configure</B> (int)<BR>
+<B>ppp_max_failure</B> (int)<BR>
+PPP counter and timer values, as described in §4.1 of
+<a href="ftp://ftp.rfc-editor.org/in-notes/rfc1661.txt">RFC1661</a>.
+</LI>
+
<LI><B>primary_dns</B> (ip address)
<LI><B>secondary_dns</B> (ip address)<BR>
Whenever a PPP connection is established, DNS servers will be sent to the
(<B>pap</B> or <B>chap</B>), in order of preference (default <B>pap</B>).
</LI>
+<LI><B>radius_dae_port</B> (short)<BR>
+Port for DAE RADIUS (Packet of Death/Disconnect, Change of Authorization)
+requests (default: <B>3799</B>).
+</LI>
+
<LI><B>allow_duplicate_users</B> (boolean)</BR>
Allow multiple logins with the same username. If false (the default),
any prior session with the same username will be dropped when a new
</LI>
<LI><B>bind_address</B> (ip address)<BR>
-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
-containing user traffic should be routed via this address if given,
-otherwise the primary address of the machine.
+It's the listen address of the l2tp udp protocol sent and received
+to LAC. This address is also assigned to the tun interface if no
+iftun_address is specified. Packets containing user traffic should be
+routed via this address if given, otherwise the primary address of the
+machine.
+</LI>
+
+<LI><B>iftun_address</B> (ip address)<BR>
+This parameter is used when you want a tun interface address different
+from the address of "bind_address" (For use in cases of specific configuration).
+If no address is given to iftun_address and bind_address, 1.1.1.1 is used.
+</LI>
+
+<LI><B>bind_multi_address</B> (ip address)<BR>
+This parameter permit to listen several addresss of the l2tp udp protocol
+(and set several address to the tun interface).
+<BR>
+WHEN this parameter is set, It OVERWRITE the parameters "bind_address"
+and "iftun_address".
+<BR>
+these can be interesting when you want do load-balancing in cluster mode
+of the uploaded from the LAC. For example you can set a bgp.prepend(MY_AS)
+for Address1 on LNS1 and a bgp.prepend(MY_AS) for Address2 on LNS2
+(see BGP AS-path prepending).
+<BR>
+example of use with 2 address:
+<BR>
+set bind_multi_address "64.14.13.41, 64.14.13.42"
+
+</LI>
+
+<LI><B>tundevicename</B> (string)<BR>
+Name of the tun interface (default: "tun0").
</LI>
<LI><B>peer_address</B> (ip address)<BR>
Address to send to clients as the default gateway.
-</L1>
+</LI>
<LI><B>send_garp</B> (boolean)<BR>
Determines whether or not to send a gratuitous ARP for the
file dumped begins with a header, where each line is prefixed by #.
Following the header is a single line for every connected user, fields
separated by a space.<BR> The fields are username, ip, qos,
-uptxoctets, downrxoctets. The qos field is 1 if a standard user, and
-2 if the user is throttled.
+uptxoctets, downrxoctets, origin (optional). The qos field is 1 if a standard user, and
+2 if the user is throttled. The origin field is dump if account_all_origin is set to true
+(origin value: L=LAC data, R=Remote LNS data, P=PPPOE data).
+</LI>
+
+<LI><B>account_all_origin</B> (boolean)<BR>
+If set to true, all origin of the usage is dumped to the accounting file (LAC+Remote LNS+PPPOE)(default false).
</LI>
<LI><B>setuid</B> (int)<BR>
Interface for cluster packets (default: eth0).
</LI>
+<LI><B>cluster_mcast_ttl</B> (int)<BR>
+TTL for multicast packets (default: 1).
+</LI>
+
<LI><B>cluster_hb_interval</B> (int)<BR>
Interval in tenths of a second between cluster heartbeat/pings.
</LI>
Determines the minumum number of up to date slaves required before the
master will drop routes (default: 1).
</LI>
+
+<LI><B>echo_timeout</B> (int)<BR>
+Time between last packet sent and LCP ECHO generation
+(default: 10 (seconds)).
+</LI>
+
+<LI><B>idle_echo_timeout</B> (int)<BR>
+Drop sessions who have not responded within idle_echo_timeout seconds
+(default: 240 (seconds))
+</LI>
+
+<LI><B>auth_tunnel_change_addr_src</B> (boolean)<BR>
+This parameter authorize to change the source IP of the tunnels l2tp.
+This parameter can be used when the remotes BAS/LAC are l2tpns server
+configured in cluster mode, but that the interface to remote LNS are
+not clustered (the tunnel can be coming from different source IP)
+(default: no).
+</LI>
+
+<LI><B>disable_sending_hello</B> (boolean)<BR>
+Disable l2tp sending HELLO message for Apple compatibility.
+Some OS X implementation of l2tp no manage the L2TP "HELLO message".
+(default: no).
+</LI>
+
+</UL>
+
+<P><U><B>LAC configuration</B></U></P>
+<UL>
+<LI><B>bind_address_remotelns</B> (ip address)<BR>
+Address of the interface to listen the remote LNS tunnels.
+If no address is given, all interfaces are listened (Any Address).
+</LI>
+
+<LI><B>bind_portremotelns</B> (short)<BR>
+Port to bind for the Remote LNS (default: 65432).
+</LI>
+
</UL>
+<P>A static REMOTES LNS configuration can be entered by the command:</P>
+<DL> <DD><B>setforward</B> <I>MASK</I> <I>IP</I> <I>PORT</I> <I>SECRET</I> </DL>
+
+where <I>MASK</I> specifies the mask of users who have forwarded to
+remote LNS (ex: "/friendISP@company.com").</BR>
+where <I>IP</I> specifies the IP of the remote LNS (ex: "66.66.66.55").</BR>
+where <I>PORT</I> specifies the L2TP Port of the remote LNS
+(Normally should be 1701) (ex: 1701).</BR>
+where <I>SECRET</I> specifies the secret password the remote LNS (ex: mysecret).</BR>
+</BR>
+The static Remote LNS configuration can be used when the friend ISP not
+have a proxied Radius.</BR>
+If the proxied Radius is used, It will return the RADIUS attributes:</BR>
+ Tunnel-Type: 1 = L2TP</BR>
+ Tunnel-Medium-Type: 1 = IPv4</BR>
+ Tunnel-Password: 1 = "LESECRETL2TP"</BR>
+ Tunnel-Server-Endpoint: 1 = "88.xx.xx.x1"</BR>
+ Tunnel-Assignment-Id: 1 = "friendisp_lns1"</BR>
+ Tunnel-Type: 2 = L2TP</BR>
+ Tunnel-Medium-Type: 2 = IPv4</BR>
+ Tunnel-Password: 2 = "LESECRETL2TP"</BR>
+ Tunnel-Server-Endpoint: 2 = "88.xx.xx.x2"</BR>
+ Tunnel-Assignment-Id: 2 = "friendisp_lns2"</BR>
+
+<P><U><B>PPPOE configuration</B></U></P>
+
+<UL>
+<LI><B>pppoe_if_to_bind</B> (string)<BR>
+PPPOE server interface to bind (ex: "eth0.12"), If not specified the server PPPOE is not enabled.
+For the pppoe clustering, all the interfaces PPPOE of the clusters must use the same HW address (MAC address).
+</LI>
+
+<LI><B>pppoe_service_name</B> (string)<BR>
+PPPOE service name (default: NULL).
+</LI>
+
+<LI><B>pppoe_ac_name</B> (string)<BR>
+PPPOE access concentrator name (default: "l2tpns-pppoe").
+</LI>
+
+<LI><B>pppoe_only_equal_svc_name</B> (boolean)<BR>
+If set to yes, the PPPOE server only accepts clients with a "service-name"
+different from NULL and a "service-name" equal to server "service-name" (default: no).
+</LI>
+
+</UL>
+
+<P><U><B>BGP configuration</B></U></P>
+
<P>BGP routing configuration is entered by the command:
The routing configuration section is entered by the command
<DL><DD><B>router bgp</B> <I>as</I></DL>
terminated. This signal should be used to stop l2tpns on a
<A HREF="#Clustering">cluster node</A> where there are other machines to
continue handling traffic.</DD>
-<DT>SIGQUIT</DT><DD>Shut down: closes sessions and tunnels.</DD>
+<DT>SIGQUIT</DT><DD>Shut down tunnels and sessions, exit process when
+complete.</DD>
</DL>
<H2 ID="Throttling">Throttling</H2>
some way.
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- <LI>username</LI>
- <LI>password</LI>
- <LI>protocol (0xC023 for PAP, 0xC223 for CHAP)</LI>
- <LI>continue_auth - Set to 0 to stop processing authentication modules</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ <DT>username
+ <DT>password
+ <DT>protocol<DD>0xC023 for PAP, 0xC223 for CHAP
+ <DT>continue_auth<DD>Set to 0 to stop processing authentication modules
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>post_auth</B></TD>
to be accepted.
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- <LI>username</LI>
- <LI>auth_allowed - This is already set to true or
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ <DT>username
+ <DT>auth_allowed<DD>This is already set to true or
false depending on whether authentication has been
allowed so far. You can set this to 1 or 0 to force
- allow or disallow authentication</LI>
- <LI>protocol (0xC023 for PAP, 0xC223 for CHAP)</LI>
- </UL>
+ allow or disallow authentication
+ <DT>protocol<DD>0xC023 for PAP, 0xC223 for CHAP
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>packet_rx</B></TD>
seriously slow down the system.</FONT>
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- <LI>buf - The raw packet data</LI>
- <LI>len - The length of buf</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ <DT>buf<DD>The raw packet data
+ <DT>len<DD>The length of buf
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>packet_tx</B></TD>
seriously slow down the system.</FONT>
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- <LI>buf - The raw packet data</LI>
- <LI>len - The length of buf</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ <DT>buf<DD>The raw packet data
+ <DT>len<DD>The length of buf
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>timer</B></TD>
you do is reentrant.
</TD>
<TD>
- <UL>
- <LI>time_now - The current unix timestamp</LI>
- </UL>
+ <DL>
+ <DT>time_now<DD>The current unix timestamp
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>new_session</B></TD>
session is now ready to handle traffic.
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>kill_session</B></TD>
This may be called multiple times for the same session.
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>radius_response</B></TD>
modules.
</TD>
<TD>
- <UL>
- <LI>t - Tunnel ID</LI>
- <LI>s - Session ID</LI>
- <LI>key</LI>
- <LI>value</LI>
- </UL>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ <DT>key
+ <DT>value
+ </DL>
+ </TD>
+ </TR>
+ <TR VALIGN=TOP BGCOLOR=WHITE><TD><B>radius_reset</B></TD>
+ <TD>This is called whenever a RADIUS CoA request is
+ received to reset any options to default values before
+ the new values are applied.
+ </TD>
+ <TD>
+ <DL>
+ <DT>t<DD>Tunnel
+ <DT>s<DD>Session
+ </DL>
</TD>
</TR>
<TR VALIGN=TOP BGCOLOR=WHITE><TD><B>control</B></TD>
required.
</TD>
<TD>
- <UL>
- <LI>buf - The raw packet data</LI>
- <LI>l - The raw packet data length</LI>
- <LI>source_ip - Where the request came from</LI>
- <LI>source_port - Where the request came from</LI>
- <LI>response - Allocate a buffer and put your response in here</LI>
- <LI>response_length - Length of response</LI>
- <LI>send_response - true or false whether a response
- should be sent. If you set this to true, you must
- allocate a response buffer.</LI>
- <LI>type - Type of request (see nsctl.c)</LI>
- <LI>id - ID of request</LI>
- <LI>data - I'm really not sure</LI>
- <LI>data_length - Length of data</LI>
- </UL>
+ <DL>
+ <DT>iam_master<DD>Cluster master status
+ <DT>argc<DD>The number of arguments
+ <DT>argv<DD>Arguments
+ <DT>response<DD>Return value: NSCTL_RES_OK or NSCTL_RES_ERR
+ <DT>additional<DD>Extended response text
+ </DL>
</TD>
</TR>
</TABLE>
can use "maximum-paths" (which works for EBGP) and set
<B>as_number</B> to a private value such as 64512.<P>
-<H2 ID="AvoidingFragmentation">Avoiding Fragmentation</H2>
-
-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:
-
-<pre>
-iptables -A FORWARD -i tun+ -o eth0 \
- -p tcp --tcp-flags SYN,RST SYN \
- -m tcpmss --mss 1413:1600 \
- -j TCPMSS --set-mss 1412
-</pre>
-
<H2 ID="Performance">Performance</H2>
Performance is great.<P>
projects / l2tpns.git / blobdiff