ZyAIR Wireless Gateway Series User’s Guide

 

 

Table 13-8 Security

 

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

 

 

Do not respond

Select this option to prevent hackers from finding the ZyAIR by probing for unused

 

 

to requests for

ports. If you select this option, the ZyAIR will not respond to port request(s) for unused

 

 

unauthorized

ports, thus leaving the unused ports and the ZyAIR unseen. By default this option is

 

 

services

not selected and the ZyAIR will reply with an ICMP Port Unreachable packet for a port

 

 

 

probe on its unused UDP ports, and a TCP Reset packet for a port probe on its

 

 

 

unused TCP ports.

 

 

 

Note that the probing packets must first traverse the ZyAIR's firewall mechanism

 

 

 

before reaching this anti-probing mechanism. Therefore if the firewall mechanism

 

 

 

blocks a probing packet, the ZyAIR reacts based on the firewall policy, which by

 

 

 

default, is to send a TCP reset packet for a blocked TCP packet. You can use the

 

 

 

command "sys firewall tcprst rst [onoff]" to change this policy. When the firewall

 

 

 

mechanism blocks a UDP packet, it drops the packet without sending a response

 

 

 

packet.

 

 

 

 

 

 

Apply

Click Apply to save your changes back to the ZyAIR.

 

 

 

 

 

 

Reset

Click Reset to begin configuring this screen afresh.

 

 

 

 

 

Remote Management

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