User's Manual

Horizons 1500WR Wireless 4-Port Router
107
ParkerVision
13.8 Conguring Security
To change your 1500WR Wireless Router’s security settings, click ADVANCED, REMOTE MANAGE-
MENT and then the Security tab. The screen appears as shown.
If an outside user attempts to probe an unsupported port on your 1500WR Wireless Router, an ICMP
response packet is automatically returned. This allows the outside user to know the 1500WR Wireless
Router exists. The 1500WR Wireless Router series support anti-probing, which prevents the ICMP
response packet from being sent. This keeps outsiders from discovering your 1500WR Wireless Router
when unsupported ports are probed.
The following table describes the labels in this screen.
Security
LABEL DESCRIPTION
ICMP 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
The 1500WR Wireless Router will not respond to any incoming Ping requests when
Disable is selected. Select LAN to reply to incoming LAN Ping requests. Select 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 nding the 1500WR Wireless Router by
probing for unused ports. If you select this option, the 1500WR Wireless Router will
not send ICMP response packets to port request(s) for unused ports, thus leaving the
unused ports and the 1500WR Wireless Router unseen.
If the rewall blocks a packet from the WAN, the 1500WR Wireless Router sends
a TCP reset packet. Use the “sys rewall tcprst rst off’ command in the command
interpreter if you want to stop the 1500WR Wireless Router from sending TCP reset
packets.
Apply Click Apply to save your changes back to the 1500WR Wireless Router.
Reset Click Reset to begin conguring this screen afresh.

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