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WR1500 4-Port Wireless DSL/Cable Router
®
109
13.8 Confi guring Security
To change your WR1500 Wireless Router’s security settings, click
ADVANCED
,
REMOTE
MANAGEMENT
and then the
Security tab
. The screen appears as shown.
If an outside user attempts to probe an unsupported port on your WR1500 Wireless Router,
an ICMP response packet is automatically returned. This allows the outside user to know the
WR1500 Wireless Router exists. The WR1500 Wireless Router series support anti-probing,
which prevents the ICMP response packet from being sent. This keeps outsiders from
discovering your WR1500 Wireless Router when unsupported ports are probed.
The following table describes the labels in this screen.
Security
LABEL
DESCRIPTION
DESCRIPTION
ICMP
ICMP
Internet Control Message Protocol is a message control and error-reporting protocol
Internet Control Message Protocol is a message control and error-reporting protocol
between a host server and a gateway to the Internet. ICMP uses Internet Protocol
(IP) datagrams, but the messages are processed by the TCP/IP software and directly
apparent to the application user.
Respond to Ping
on
on
The WR1500 Wireless Router will not respond to any incoming Ping requests when
Disable
Disable
is selected. Select
is selected. Select
LAN
LAN
to reply to incoming LAN Ping requests. Select
to reply to incoming LAN Ping requests. Select
WAN
WAN
to reply to incoming WAN Ping requests. Otherwise select
LAN&WAN
to reply to both
incoming LAN and WAN Ping requests.
Do not respond
to requests for
unauthorized
services
Select this option to prevent hackers from fi nding the WR1500 Wireless Router by
Select this option to prevent hackers from fi nding the WR1500 Wireless Router by
probing for unused ports. If you select this option, the WR1500 Wireless Router will
not send ICMP response packets to port request(s) for unused ports, thus leaving the
unused ports and the WR1500 Wireless Router unseen.
If the fi rewall blocks a packet from the WAN, the WR1500 Wireless Router sends
a TCP reset packet. Use the “sys fi rewall tcprst rst off’ command in the command
interpreter if you want to stop the WR1500 Wireless Router from sending TCP reset
packets.
Apply
Click
Click
Apply
to save your changes back to the WR1500 Wireless Router.
Reset
Click
Click
Reset
to begin confi guring this screen afresh.
to begin confi guring this screen afresh.
Apply Reset
REMOTE MANAGEMENT
Respond to Ping on
LAN & WAN
Do not respond to requests for unauthorized services
TELNET
ICMP
FTP
WWW
SNMP
DNS
Security