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Protocol:
Protocol:
Protocol:
Select the protocol (TCP/UDP/Both) for the
application.
Well-Known
Well-Known
Well-Known
Service
Service
Service
Port:
Port:
Port:
Select the well-known services as DNS, FTP
from the drop-down
menu to
add to
the
configured one above.
Delete/Enable:
Delete/Enable:
Delete/Enable:
Click to check it for corresponding operation.
In Well-known Service Port, list the common ports,
you
can
select
one
from
them
and
add
one
ID
number from the drop-down menu, click
“
Add” to add
the port in the above table. If the port does not list in
the Well-known service port drop-down menu, you
can add it by manual.
Add:
Add:
Add:
To
add the well-know port to ID you selected.
provides Web service via port 80, and you want to
forward this service to port 40, configure it as the
above setting.
NOTE:
NOTE:
NOTE:
If
If
If
you
you
you
set
set
set
the
the
the
virtual
virtual
virtual
server
server
server
of
of
of
the
the
the
service
service
service
port
port
port
as
as
as
80,
80,
80,
you
you
you
must
must
must
set
set
set
the
the
the
Web
Web
Web
management
management
management
port
port
port
on
on
on
Remote
Remote
Remote
Web
Web
Web
Management
Management
Management
page
page
page
to
to
to
be
be
be
any
any
any
value
value
value
except
except
except
80
80
80
such
such
such
as
as
as
8080.
8080.
8080.
Otherwise,
Otherwise,
Otherwise,
there
there
there
will
will
will
be
be
be
a
conflict
conflict
conflict
to
to
to
disable
disable
disable
the
the
the
virtual
virtual
virtual
server.
server.
server.
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8.3
8.3
8.3
Port
Port
Port
Trigger
Trigger
Trigger
Setting
Setting
Setting
When internal clients have access to external server
in
the
Internet
for
some
application,
the
clients
request to connect with severs, and the server will
also ask to connect with client. But in the default
setting, router will refuse to accept any request from
WAN, which will bring communication halt. The port
triggering is used to define triggering rules. So when
clients have access to the
server,
the device will open
the port through which the server sends the request
to client.
IP
IP
IP
Range:
Range:
Range:
The internal IP address range for requesting
external server application.
Trigger
Trigger
Trigger
Port
Port
Port
The port range through which the internal
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clients
send
request
traffics
to
external
server with the range of 1
65535. Note
that the low number first and two blanks
can keep the same number if needed.
External
External
External
Port:
Port:
Port:
The port range through which the external
server
send
request
traffics
to
internal
clients with the range of 1
65535. Note
that the low number first and two blanks
can keep the same number if needed.
Apply:
Apply:
Apply:
To
enable or disable the rule.
Add:
Add:
Add:
After edit the rule, click the “add” button to
add the current entry to port triggering list.
Apply:
Apply:
Apply:
Click
“
Apply” to activate the current rule.
Cancel:
Cancel:
Cancel:
Click “Cancel” to drop all setting saved last
time.
It is allowed to delete or modify the previous rules in
the list table.
Note:
Note:
Note:
The
The
The
special
special
special
application
application
application
can
can
can
be
be
be
only
only
only
used
used
used
in
in
in
one
one
one
PC.
PC.
PC.
If
If
If
there
there
there
is
is
is
more
more
more
than
than
than
one
one
one
PC
PC
PC
to
to
to
open
open
open
the
the
the
same
same
same
triggering
triggering
triggering
port,
port,
port,
the
the
the
external
external
external
port
port
port
will
will
will
be
be
be
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65
8.4
8.4
8.4
ALG
ALG
ALG
Service
Service
Service
Setting
Setting
Setting
ALG (Application Layer Gateway) in the context of
computer
networking,
an
ALG or
application
layer
gateway
consists
of
a
security
component
that
augments a firewall or NAT employed in a computer
network. It allows customized NAT traversal filters to
be plugged into the gateway to support address and
port
translation
for
certain
application
layer
"control/data" protocols such as
FTP,
Bit Torrent,
SIP,
RTSP,
file transfer applications etc.
In order for these protocols to work through NAT or a
firewall, either the application has to know about an
address/port
number
combination
that
allows
incoming packets,
or
the NAT has
to
monitor
the
control traffic and open up port mappings (firewall
19216811.live