1 URL : http://www.xelerance.com/software/xl2tpd/
2 Summary : Layer 2 Tunnelling Protocol Daemon (RFC 2661)
4 xl2tpd is an implementation of the Layer 2 Tunnelling Protocol (RFC 2661).
5 L2TP allows you to tunnel PPP over UDP. Some ISPs use L2TP to tunnel user
6 sessions from dial-in servers (modem banks, ADSL DSLAMs) to back-end PPP
7 servers. Another important application is Virtual Private Networks where
8 the IPsec protocol is used to secure the L2TP connection (L2TP/IPsec,
9 RFC 3193). The L2TP/IPsec protocol is mainly used by Windows and
10 Mac OS X clients. On Linux, xl2tpd can be used in combination with IPsec
11 implementations such as Openswan.
12 Example configuration files for such a setup are included in this RPM.
14 xl2tpd works by opening a pseudo-tty for communicating with pppd.
15 It runs completely in userspace but supports kernel mode L2TP.
17 xl2tpd supports IPsec SA Reference tracking to enable overlapping internak
18 NAT'ed IP's by different clients (eg all clients connecting from their
19 linksys internal IP 192.168.1.101) as well as multiple clients behind
22 xl2tpd supports the pppol2tp kernel mode operations on 2.6.23 or higher,
23 or via a patch in contrib for 2.4.x kernels. Note that kernel mode and
24 IPsec SA Reference tracking do not yet work together.
26 Xl2tpd is based on the 0.69 L2TP by Jeff McAdams <jeffm@iglou.com>
27 It was de-facto maintained by Jacco de Leeuw <jacco2@dds.nl> in 2002 and 2003.