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