Anti-Probing; Figure 129 Security > Firewall > Anti-Probing - ZyXEL Communications ZYWALL 2 PLUS User Manual

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Table 53 SECURITY > FIREWALL > Rule Summary > Edit

Matched Packets

11.10 Anti-Probing

Click SECURITY > FIREWALL > Anti-Probing to open the following screen. Configure

this screen to help keep the ZyWALL hidden from probing attempts. You can specify which of

the ZyWALL's interfaces will respond to Ping requests and whether or not the ZyWALL is to

respond to probing for unused ports.

Figure 129 SECURITY > FIREWALL > Anti-Probing

ZyWALL 2 Plus User's Guide

Use the drop-down list box to select what the firewall is to do with packets that

match this rule.

Select Drop to silently discard the packets without sending a TCP reset packet or

an ICMP destination-unreachable message to the sender.

Select Reject to deny the packets and send a TCP reset packet (for a TCP packet)

or an ICMP destination-unreachable message (for a UDP packet) to the sender.

Select Permit to allow the passage of the packets.

Note: You also need to configure NAT port forwarding (or full

featured NAT address mapping rules) if you want to

allow computers on the WAN to access devices on the

Note: You may also need to configure the remote management

settings if you want to allow a WAN computer to manage

the ZyWALL or restrict management from the LAN.

Click Apply to save your customized settings and exit this screen.

Click Cancel to exit this screen without saving.

Chapter 11 Firewall