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Aolynk DR814Q ADSL2+ Broadband Router 5 Advanced Configuration
46
Delete the settings that forbid external hosts to ping the WAN port of the DR814Q. Note
that the protocol type of ping is ICMP.
Figure 5-8 Configure port filtering policy – delete the settings
Add settings that permit external hosts to ping the WAN port of the DR814Q.
Figure 5-9 Configure port filtering policy – add new settings
Caution:
Any request mismatching no filtering policy will be blocked by the firewall.
5.2.3 Trigger
A trigger is used to deal with application protocols that set up separate sessions. Some
application protocols, such as NetMeeting, open the primary sessions and secondary
connections at the same time during the normal operations. The trigger tells the
security mechanism to handle these secondary sessions and instruct it how to handle
them. The trigger handles the situation dynamically, allowing the secondary sessions
only when appropriate. These newly triggered sessions are not restricted by the
firewall.
Click the [Trigger] tab in the security setup page to enter the corresponding page shown
in Figure 5-10.
Figure 5-10 Trigger settings