
ZyAIR Wireless Gateway Series User’s Guide
13-12 Remote Management
anti-probing, which prevents the ICMP response packet from being sent. This keeps outsiders from
discovering your ZyAIR when unsupported ports are probed.
Figure 13-8 Security
The following table describes the labels in this screen.
Table 13-8 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 ZyAIR 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 ZyAIR by probing for unused
ports. If you select this option, the ZyAIR will not send ICMP response packets to port
request(s) for unused ports, thus leaving the unused ports and the ZyAIR unseen.
If the firewall blocks a packet from the WAN, the ZyAIR sends a TCP reset packet.
Use the "sys firewall tcprst rst off" command in the command interpreter if you want to
stop the ZyAIR from sending TCP reset packets.
Apply
Click Apply to save your changes back to the ZyAIR.
Reset
Click Reset to begin configuring this screen afresh.
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