19
Medium
If
Medium
is selected in the “Firewall Security Level” screen, the services listed at the bottom of the
screen (
HTTP
,
FTP
,
POP3
,
SMTP
,
IMAP
,
IMAP
v
3
,
DNS
,
IPSEC IKE
,
IPSEC ESP
,
HTTPS
, and
NNTP
) are
allowed to pass through the firewall. Additionally, the user can click in the appropriate check box to allow
or deny access for a particular service (check mark in the check box to allow; blank check box to deny). All
services not listed are denied access.
Low
If
Low
is selected in the “Firewall Security Level” screen, the services listed at the bottom of the screen
(
NETBIOS-SSN
,
DNS
,
EPMAP
,
PROFILE
,
NETBIOS-NS
,
NETBIOS-DGM
,
MICROSOFT-DS
,
SNMP
,
LDAP
,
and
MICROSOFT-GC
,) are blocked by the firewall. Additionally, the user can click in the appropriate check
box to allow or deny access for a particular service (check mark in the check box to allow; blank check box
to deny). All services not listed are denied access.
51 Chapter 4 Using Advanced Setup
Off
If
Off
is selected in the “Firewall Security Level” screen, firewall filtering is based solely on the basic
NAT
firewall.
Dynamic Routing
Selecting
Dynamic Routing
in the “Configuring the Advanced Settings” screen generates the “Dynamic
Routing” screen.
If another router or gateway is set up behind the Gateway in the network configuration, consult the
documentation that came with the other router/gateway to see what kind of Dynamic Routing is required
operate it with the Gateway, then select the appropriate option.
52 Actiontec 54 Mbps Wireless DSL Gateway User Manual
NAT (Network Address Translation)
Selecting
NAT
in the “Configuring the Advanced Settings” screen generates the “
NAT
” screen. The
Gateway’s basic firewall security is based on
NAT
. Disabling
NAT
allows the computers connected to the
Gateway to be accessed by outside parties. Do not turn
NAT
off unless instructed to do so by the
ISP
.
Static Routing
Selecting
Static Routing
in the “Configuring the Advanced Settings” screen generates the “Static Routing”
screen. Enter the addresses in their respective text boxes, then click
Add
. The address will appear in the
“Static Routing Table.” To remove an address, highlight it by clicking on it in the Static Routing Table,
then click
Remove
.
53 Chapter 4 Using Advanced Setup
UPnP (Universal Plug and Play)
Selecting
UPnP
in the “Configuring the Advanced Settings” screen generates the “
UP
n
P
” screen. In this
screen, the Universal Plug and play option is turned on or off by activating the appropriate circle.
Universal Plug and Play is a zero-configuration networking protocol that allows hardware and software
(such as Netmeeting) to operate more efficiently. If Netmeeting is not running properly, activate
UP
n
P
.