SR808ac Cable Modem User Manual
25
Figure 19 Port Triggers
Port Triggers are similar to Port Forwarding except that they are not static ports held
open all the time.
When the CMRG detects outgoing data on a specific IP port
number set in the “Trigger Range”, the resulting ports set in the “Target Range” are
opened for incoming (or sometimes referred to as bi-directional ports) data. If no
outgoing traffic is detected on the “Trigger Range” ports for 10 minutes, the “Target
Range” ports will close. This is a safer method for opening specific ports for special
applications (e.g. video conferencing programs, interactive gaming, file transfer in
chat programs, etc.) because they are dynamically triggered and not held open
constantly or erroneously left open via the router administrator and exposed for
potential hackers to discover.
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