ZyXEL Communications ZyXEL ZyWALL IDP 10 - Manual (Page 34)

ZyWALL IDP 10 User’s Guide
4-2 Interface Screens
Table 4-1 Interface: Link
LABEL DESCRIPTION
WAN Select the speed (10 or 100 Mbps) and duplex mode (Full, Half, Auto) for this port.
LAN Select the speed (10 or 100 Mbps) and duplex mode (Full, Half, Auto) for this port.
Management Select the speed (10 or 100 Mbps) and duplex mode (Full, Half, Auto) for this port.
Apply Click this button to save your changes back to the ZyWALL.
Reset Click this button to begin configuring this screen afresh.
4.3 Stealth
Stealth enabled on a port means that the ZyWALL drops all incoming packets destined for the
ZyWALL received on that port with no response to the sender. The ZyWALL doesn’t respond to
ICMP requests such as Ping, that is, it doesn’t send ICMP_ECHO_REPLY packets. It doesn’t send
TCP_RST packets if a TCP connection is blocked nor does it send ICMP_PORT UNREACHABLE
packets for UDP requests or forwarded traffic.
Replies to outgoing traffic from the ZyWALL are also not allowed.
When a port is in stealth mode, you cannot do remote
management or policy updates on that port.
You will have to disable stealth on the LAN port or WAN port (via the MGMT port or console port)
before being allowed to manage the ZyWALL from that port. The MGMT port has no stealth function.
To change your ZyWALL’s stealth settings, click INTERFACE, then the Stealth tab.
Figure 4-2 Interface: Stealth
The following table describes the fields in this screen.