TP-Link TL-ER6120 User Manual page 57

Note:
● The Trigger Port and Incoming Port should be set in the range of 1-65535. The Incoming Port can
be set in a continuous range such as 8690-8696.
● The router supports up to 16 Port Triggering entries. Each entry supports at most 5 groups of
trigger ports and overlapping between the ports is not allowed.
● Each entry supports at most 5 groups of incoming ports and the sum of incoming ports you set for
each entry should not be more than 100.
List of Rules

In this table, you can view the information of the entries and edit them by the Action buttons.
The first entry in Figure 3-33 indicates that: This is a Port Triggering entry named host1, When the
LAN host initiates a TCP request via port of 5354, the incoming port 5355 will open for TCP and
UDP protocol. This entry is activated.
3.3.1.6 ALG
Some special protocols such as FTP, H.323, SIP, IPsec and PPTP will work properly only when ALG
(Application Layer Gateway) service is enabled.
Choose the menu Advanced→NAT→ALG to load the following page.
The following items are displayed on this screen:
ALG

FTP ALG:
H.323 ALG:
Figure 3-34 ALG
Enable or disable FTP ALG. The default setting is enabled. It is
recommended to keep the default setting if no special requirement.
Enable or disable H.323 ALG. The default setting is enabled. H.323 is
used for various applications such as NetMeeting and VoIP.
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