ZyXEL Communications Corporation OX253P Manual De Usuario
Chapter 13 The Remote Management Screens
OX253P User’s Guide
141
13.7 Security
Click TOOLS > Remote Management > Security to access this screen. Use this
screen to control how your OX253P responds to other types of requests.
screen to control how your OX253P responds to other types of requests.
Figure 62 TOOLS > Remote Management > Security
The following table describes the labels in this screen.
Table 56 TOOLS > Remote Management > Security
LABEL
DESCRIPTION
Respond to Ping
on
on
Select the interface(s) on which the OX253P should respond to
incoming ping requests.
incoming ping requests.
• Disable - the OX253P does not respond to any ping requests.
• LAN - the OX253P only responds to ping requests received from the
• LAN - the OX253P only responds to ping requests received from the
LAN.
• WAN - the OX253P only responds to ping requests received from
the WAN.
• LAN & WAN - the OX253P responds to ping requests received from
the LAN or the WAN.
Do not respond
to requests for
unauthorized
services
to requests for
unauthorized
services
Select this to prevent outsiders from discovering your OX253P by
sending requests to unsupported port numbers. If an outside user
attempts to probe an unsupported port on your OX253P, an ICMP
response packet is automatically returned. This allows the outside user
to know the OX253P exists. Your OX253P supports anti-probing, which
prevents the ICMP response packet from being sent. This keeps
sending requests to unsupported port numbers. If an outside user
attempts to probe an unsupported port on your OX253P, an ICMP
response packet is automatically returned. This allows the outside user
to know the OX253P exists. Your OX253P supports anti-probing, which
prevents the ICMP response packet from being sent. This keeps
outsiders from discovering your OX253P when unsupported ports are
probed.
probed.
If you clear this, your OX253P replies with an ICMP Port Unreachable
packet for a port probe on unused UDP ports and with a TCP Reset
packet for a port probe on unused UDP ports and with a TCP Reset
packet for a port probe on unused TCP ports.
Apply
Click to save your changes.
Reset
Click to restore your previously saved settings.