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Cyclades-PR1000
Chapter 5 - Configuration of the Ethernet Interface 42
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 Does not apply to Expanded NAT. Determines the type of IP address if NAT is being used.
Use
Global
otherwise. See chapter 11 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 12 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 10. 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 12 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 affecting 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.