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ZyXEL Communications Internet Security Gateway ZyWALL 100 User Manual

Page 327

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ZyWALL 100 Internet Security Gateway

PPTP

K

The PPP frames are tunneled between the PNS and PAC over GRE (General Routing Encapsulation, RFC
1701, 1702). The individual calls within a tunnel are distinguished using the Call ID field in the GRE
header.