User's Manual

ADSL2+ModemRouterUserManual
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4.3.2.5PortTrigger:
Port trigger is used to restrict certain types of data packets from your local network  to
internet.Useofsuchfilterscanbehelpfulinsecuringandrestrictingyourlocalnetwork.
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ChooseAdvanced‐>NAT‐>PortTriggerpage,youcanconfiguretheporttrigge r rules.