IPitomy IP1000 User Guide - Manual (Page 29)

ƒ IPSec Passthrough – IPSec (Internet Protocol Security) is a suite of protocols used
to implement secure exchange of packets at the IP layer.
ƒ L2TP Passthrough – Layer 2 Tunneling Protocol is the method used to enable
Point-to-Point Protocol (PPP) to be tunneled through an IP network.
ƒ PPTP Passthrough – PPTP (Point-to-Point Tunneling Protocol) Passthrough allows
the Point-to-Point Protocol (PPP) to be tunneled through an IP network.
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