Binary package “xl2tpd” in ubuntu lucid

a layer 2 tunneling protocol implementation

 xl2tpd is an open source implementation of the L2TP tunneling
 protocol (RFC2661). xl2tpd is forked from l2tpd and is maintained by
 Xelerance Corporation.
 The main purpose of this protocol is to tunnel PPP frames through IP
 networks. It implements both LAC and LNS role in the L2TP networking