128
3
2
4
Port
Mapping
for
Special
Applications
Some
applications
require
more
than
one
connection
at
a
time;
these
applications
won’t
work
with
simple
NAT
rules.
In
order
to
make
these
applications
work,
you
can
use
this
function
to
let
these
applications
work.
Here
are
descriptions
of
every
setup
item:
Enable
(1):
Check
this
box
to
enable
special
applications
and
uncheck
this
box
to
disable
the
virtual
server.
IP
Address
(2):
Input
the
IP
address
of
the
computer
that
you
want
to
open
the
ports.
Computer
Name
(3):
Pull
down
the
menu
and
all
the
computers
connected
to
the
router
will
be
listed
here.
You
can
easily
select
the
computer
name
without
checking
the
IP
address
of
the
computer.
TCP
Port
to
Open
(4):
This
is
the
out
going
(Outbound)
range
of
TCP
port
numbers
for
this
particular
application.
1
2 3
4 5
8
9
10
11
12
7
6
13
14
