22 lines
1.1 KiB
Plaintext
22 lines
1.1 KiB
Plaintext
xl2tpd is an implementation of the Layer 2 Tunnelling Protocol (RFC 2661).
|
|
L2TP allows you to tunnel PPP over UDP. Some ISPs use L2TP to tunnel user
|
|
sessions from dial-in servers (modem banks, ADSL DSLAMs) to back-end PPP
|
|
servers. Another important application is Virtual Private Networks where
|
|
the IPsec protocol is used to secure the L2TP connection (L2TP/IPsec,
|
|
RFC 3193). The L2TP/IPsec protocol is mainly used by Windows and
|
|
Mac OS X clients. On Linux, xl2tpd can be used in combination with IPsec
|
|
implementations such as Openswan.
|
|
Example configuration files for such a setup are included in this RPM.
|
|
|
|
xl2tpd works by opening a pseudo-tty for communicating with pppd.
|
|
It runs completely in userspace but supports kernel mode L2TP.
|
|
|
|
xl2tpd supports IPsec SA Reference tracking to enable overlapping internak
|
|
NAT'ed IP's by different clients (eg all clients connecting from their
|
|
linksys internal IP 192.168.1.101) as well as multiple clients behind
|
|
the same NAT router.
|
|
|
|
xl2tpd supports the pppol2tp kernel mode operations on 2.6.23 or higher,
|
|
or via a patch in contrib for 2.4.x kernels. Note that kernel mode and
|
|
IPsec SA Reference tracking do not yet work together.
|