Lightning SA MultiCom, User Manual

Page: 148 / 172

Glossary
148 Glossary User’s Manual
AH
Authentication Header can be part of an IP packet header that can ensure the
integrity of the data and the IP header itself. It does not encrypt the data however.
See RFC2402.
ARP
The Address Resolution Protocol is used by TCP/IP to convert an IP address into
a DLC or MAC address of a network interface. Whenever network traffic is
made the first step is for the computer to make an ARP request to find the correct
network interface to send the packet to.
See RFC826.
ARP Proxy
The Proxy of the Address Resolution Protocol is used by a network interface to
pretend that it is in fact one or more different interfaces. After responding to an
ARP request for the IP address that is being proxied, the remote device will send
the IP packet to the ARP Proxy for further processing. This process can allow
multiple IP addresses to receive traffic as if they were directly connected to the
Internet when in fact they are hidden behind a network firewall.
Authentication
The process of identifying oneself over a network. This is commonly done by
entering a user name and secret password to receive access to a network or
networked device. A very common form of authentication is when you identify
yourself to your Internet Service Provider to have access to the Internet.
drop discarding the data packet as if it had never received it
accept allow the data packet to pass
reject like drop but sending out an ICMP message to the source that
the data arrived but was rejected
forward redirects a data packet to a local port
log make a syslog report on the detection of the data packet
return return to a previous set of rules (only available from the filter
user library).