User Guide

ATMF25.6
Result
Via the PPPoAtoPPTP
Rela
y
16 Network Security - NAT & PAT
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3EC 36231 ABAA TCZZA Ed. 01
The ATMF25.6 port offers maximum IP transparency because it
switches ATM cells and does not touch IP information.
You might consider the following setup:
Step Action
1 Install both an ATMF25.6 PCNIC and Ethernet PCNIC in a PC.
2 Install an OS on this PC that has routing capabilities, e.g. Windows
NT, UNIX, etc.
3 Install on this PC a NAT/PAT package that supports all TCP/IP
protocols.
Now this PC can act as some 'home gateway'.
4 Connect the ATMF25.6 port of the STPro to the ATMF25.6 PCNIC.
5 Connect your local LAN to the Ethernet PCNIC.
The Public IP address goes transparently through the STPro to
end up in this advanced 'home gateway', where more complex
NAT and/or PAT operations can be performed.
A similar configuration as above can be used in combination with
the STPro PPPoAtoPPTP Relay.
Instead of installing an ATMF25.6 PCNIC, you must install a
second Ethernet PCNIC that connects to the STPro.
By setting up a PPTP tunnel from the 'home gateway', again the
Public IP address is transported transparently through the STPro to
end up in the 'home gateway'.