
Chapter 2 Wireless Security Checklist
3
apter 2:
Wire
ess Securit
C
ec
is
ire
ess networ
s are convenient an
eas
to insta
, so
homes with hi
h-speed Internet access are adoptin
them
t a rapid pace. Because wireless networking operates by
sending in
ormation over radio waves, it can be more
v
ln
r
l
in
r
r
h
n
r
i
i
n
l wir
n
w
rk
Like signals from your cellular or cordless phones, signals
rom
our wireless network can also be intercepted. Since
ou cannot ph
sicall
prevent someone
rom connecting
to your wireless network, you need to take some additional
steps to
eep
our networ
secure.
1. Change the default wireless
network name or SSID
ireless devices have a default wireless network name
or Service Set Identi
ier (SSID) set b
the
actor
. This is
the name o
our wireless network, and can be up to 32
characters in length. Linksys by Cisco wireless products
in
s
sas the de
ault wireless network name. You
should chan
e the wireless network name to somethin
nique to distinguish your wireless network from other
wire
ess networ
s t
at ma
exist aroun
ou,
ut
o not
se personal in
ormation (such as
our Social Securit
umber) because this information may be available for
n
one to see when browsing
or wireless networks.
2. Change the default password
For wire
ess pro
ucts suc
as access points, routers, an
odem routers,
ou will be asked
or a password when
you want to change their settings. These devices have a
de
ault password set b
the
actor
. The de
ault password
min. Hackers know these de
aults and ma
tr
to
se them to access your wireless device and change your
etwor
settings. To t
wart an
unaut
orize
c
anges,
customize the device’s password so it will be hard to
guess.
3. Enable MAC address filtering
Linksys by Cisco routers and modem routers give you
t
e a
i
it
to ena
e Me
ia Access Contro
(MAC) a
ress
ilterin
. The MAC address is a unique series o
numbers
nd letters assigned to every networking device. With
MAC address
iltering enabled, wireless network access
s provided solel
or wireless devices with speci
ic MAC
ddresses. For example, you can specify the MAC address
o
each computer in
our home so that onl
those
computers can access
our wireless network.
4. Enable encryption
Encr
ption protects
ata transmitte
over a wire
ess
w
rk
Wi-Fi Pr
A
WP
WPA2
and
ired Equivalency Privacy (WEP) offer different levels o
securit
or wireless communication
network encr
pted with WP
WPA
m
r
secure than a network encrypted with WEP, because
P
WPA
uses
namic
e
encr
ption. To protect
the in
ormation as it passes over the airwaves,
ou should
enable the highest level of encryption supported by your
etwor
equipment.
EP is an older encr
ption standard and ma
be the
only option available on some older devices that do not
support WP
Genera
Networ
Securit
Gui
e
ine
ireless network security is useless if the underlying
etwor
is not secure.
Password protect all computers on the network and
ndividually password protect sensitive files
C
ange passwor
s on a regu
ar
asis
Install anti-virus so
tware and personal
irewall
software.
Disable
ile sharing (peer-to-peer). Some applications
a
open
ile sharing without
our consent and/or
knowledge.
Additional Security Tip
Keep wireless routers, access points, or modem routers
way from exterior walls and windows.
urn wire
ess routers, access points, or mo
em routers
o
when the
are not being used (at night, during
vacations)
Usestrongpassp
rasest
atareat
easteig
tc
aracters
n len
th. Combine letters and numbers to avoid usin
standard words that can be found in the dictionary.
WEB:Formorein
ormationonwirelesssecurit
,
i
i
www.linksysbycisco.com/security