Netgear FVG318 참조 매뉴얼

F

irewa

ll 

Pr

otection an

d Conten

t Filter

ing

5

-5

Bec

aus

e the FVG318 us

es Ne

tw

ork Address

 T

ranslation (NA

T

), your ne

tw

ork pres

ents

 only one 

IP 

ad

dress

 to the Interne

t, and 

outs

ide users ca

nn

ot directly 

ad

dress a

ny 

of your local compute

rs. 

However

, by

 defin

ing

 an in

bo

un

d ru

le 

yo

u can make a local server (for 

ex

amp

le,

 a 

W

eb

 serv

er 

or 

ga

m

e s

erv

er) 

vis

ib

le 

an

d a

vaila

bl

e 

to th

e Inte

rn

et

. The rule 

tel

ls 

the fire

wa

ll to

 d

irect in

bo

un

d 

traf

fic for a particula

r service to one

 loca

l se

rve

r 

ba

sed on the destination port

 number

. This 

is al

so 

kn

ow

n as

 p

ort fo

rward

ing

. 

Remember that allowing inbound 

se

rvice

s opens holes in 

your 

FVG318 

W

ireles

s VPN Fire

wall. 

Only enable

 those port

s tha

t a

re nec

ess

ary for 

your ne

twor

k. F

ollowing are two application 

examples of 

inbo

un

d r

ules:

If yo

u ho

st 

a pub

lic 

W

eb ser

ver 

on

 yo

ur local 

ne

twork,

 y

ou

 can define a ru

le to

 allo

w inb

ou

nd

 W

eb 

(HTTP) 

requests from any outside IP 

address 

to the IP address of your 

W

eb server 

at 

any t

ime of 

day

. This rule is shown i

n 

:

So

me 

resid

en

tial bro

adban

d ISP

 accou

nts d

o n

ot 

all

ow yo

u 

to ru

n an

y server 

processes 

(such as a W

eb or FTP server) from 

yo

ur location. 

Y

our ISP 

may periodically 

check for servers a

nd 

may sus

pend 

your acc

ou

nt if it discove

rs any active services

 a

t 

your location. If you are 

unsure, refer 

to

 the Ac

ceptable

 Use Polic

y of your ISP

.