<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
</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
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>
+
+</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>
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