ParkerVision D2D00003 Benutzerhandbuch

Horizons 1500WR Wireless 4-Port Router 

107

13.8 Configuring 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.

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 finding 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 firewall blocks a packet from the WAN, the 1500WR Wireless Router sends 

a TCP reset packet. Use the “sys firewall 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 configuring this screen afresh.