Prestige 652H/HW Series User’s Guide
Firewall Screens
13-23
Figure 13-12 Anti-Probing
The following table describes the labels in this screen.
Table 13-6 Anti-Probing
LABEL DESCRIPTION
Respond to PING
on
The Prestige does 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. Select
DMZ
to reply to incoming DMZ Ping requests.
Otherwise select
LAN & WAN & DMZ
to reply to both incoming LAN and WAN and
DMZ Ping requests.
Do not Respond to
Requests for
Unauthorized
Services.
Select this option to prevent hackers from finding the Prestige by probing for unused
ports. If you select this option, the Prestige will not respond to port request(s) for
unused ports, thus leaving the unused ports and the Prestige unseen. By default this
option is not selected and the Prestige 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 Prestige 's firewall mechanism
before reaching this anti-probing mechanism. Therefore if the firewall mechanism
blocks a probing packet, the Prestige 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 [on|off]" to change this policy. When the firewall
mechanism blocks a UDP packet, it drops the packet without sending a response
packet.
Back
Click
Back
to return to the
Firewall Functions
screen.
Apply
Click
Apply
to save your changes back to the Prestige.
Cancel
Click
Cancel
to begin configuring this screen afresh.
Summary of Contents for Prestige 652H series
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Page 120: ...Prestige 652H HW Series User s Guide 8 12 WAN Setup Figure 8 6 Advanced WAN Backup ...
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Page 178: ...Prestige 652H HW Series User s Guide 13 16 Firewall Screens Figure 13 8 Rule Edit Example ...
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Page 214: ...Prestige 652H HW Series User s Guide 16 10 VPN Screens Figure 16 5 VPN IKE ...
Page 227: ...Prestige 652H HW Series User s Guide VPN Screens 16 23 Figure 16 8 Manual Setup ...
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Page 277: ...Maintenance VIII Part VIII Maintenance This part covers the maintenance screens ...
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