THOMSON SpeedTouch Configuration Manual page 28

Application level gateways
Specific session
information required to
de-multiplex incoming
26
The following protocols can be given as examples:
IPSec: The "SPI" field available in the ESP protocol is used to identify a
session.
traffic
PPTP: In GREv1 frames, the "CallID" field is used as a de-multiplexing
identifier.
6to4 protocol: The "InterfaceID" field, contained in the IPv6 header of a
packet, is used to identify each session.
For those applications, address translation is assisted by Custom Application Level
Gateways (ALGs) that execute the specific processing required to provide a
transparent routing solution to end hosts; the ALGs determine what kind of packet is
being processed and if needed examine and adjust packet's payload fields.
The following ALGs are embedded in the SpeedTouch™ routers; they are bound on
the mentioned default ports:
:connection bindlist
Application Proto Portrange
JABBER tcp
JABBER tcp
FTP tcp
IRC tcp
H323 tcp
ILS tcp
ILS tcp
RTSP tcp
RAUDIO(PNA) tcp
CU/SeeMe udp
SIP udp
IKE udp
ESP esp
PPTP tcp
IP6TO4 6to4
For some applications working in a UPnP infrastructure, you can also rely on the
UPnP NAT traversal capability of the SpeedTouch™ to support them across address
translation.
UPnP NAT Traversal is a set of capabilities that allows applications to
discover they are behind an address translation device,
learn the outside IP address,
and automatically configure appropriate static NAT mapping on the address
translation device so that incoming packets be properly routed back to the
application.
If the host's IP address and port are included in packet payloads, the applications
also update them directly with the proper outside IP address & port. Currently,
applications running on Windows platform (XP, 98, 98SE, ME) support UPnP NAT
traversal.
To enable UPnP feature on the SpeedTouch™, use the following CLI command:
:system config upnp=enabled
:system config
upnp discovery: enabled
mdap discovery: enabled
drst support: enabled
digest authentication: enabled
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E-NIT-CTC-20040716-0004 v1.0