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Cyclades-PR4000
Chapter 5 - Configuration of the Ethernet Interface 46
Network Protocol Menu (Continued)
Parameter Description
Secondary IP
Address
Applies to
Numbered
interfaces. Indicates a second (or third, etc. up to eight) IP
address that can be used to refer to this interface. This parameter and the next are
repeated until no value is entered.
Subnet Mask Applies to
Numbered
interfaces. Subnet mask of
Secondary IP Address
.
IP MTU Assigns the size of the Maximum Transmission Unit for the interface. This determines
whether or not a given IP datagram is fragmented.
NAT Determines the type of IP address if NAT is being used. Use
Global
otherwise. See
chapter 13 or the examples in chapter 2 for details on how to configure NAT.
ICMP Port
Active
causes the router to send ICMP Port Unreachable messages when it receives
UDP or TCP messages for ports that are not recognized. This type of message is
used by some traceroute applications, and if disabled, the router might not be identified
in the traceroute output. However, there are security and performance reasons to
leave this option
Inactive
.
Incoming Rule List Filter rule list for incoming packets. See chapter 14 for instructions on how this
parameter should be set.
Detailed Incoming IP
Accounting
Applies when a list is selected in the previous parameter. See explanation of IP
Accounting in chapter 12. IP Accounting for a rule requires that the parameter
CONFIG =>RULES LIST=>IP=>CONFIGURE RULES=>ADD RULE=>ALLOW
ACCOUNT PROCESS also be
Yes
.
Outgoing Rule List
Name
Filter rule list for outgoing packets. See chapter 14 for instructions on how this
parameter should be set.
Detailed Outgoing IP
Accounting
Applies when a list is selected in the previous parameter. See explanation of
Detailed
Incoming IP Accounting
.
Routing of Broadcast
Messages
Activating this parameter causes the router to route broadcast messages from the LAN
to the WAN and vice-versa. An individual interface can be excluded by setting this
parameter to
Inactive
, without effecting the broadcast of messages on the other
interfaces.
Proxy ARP Causes the router to answer ARP requests with its own MAC address for IP addresses
reachable on another interface.