Trivial File Transfer Protocol (Tftp); Ip Security Overview; Trivial File Transfer Protocol - Bay Networks NauticaRS Reference Manual

NauticaRS 5.5R Reference Guide

Trivial File Transfer Protocol (TFTP)

IP Security Overview

1-40
Trivial File Transfer Protocol (TFTP) is a simple protocol used to
exchange files between different units and networks for the
purposes of updating. It lacks most of the features of file Transfer
Protocol (FTP), being able to read/write only to a file with basic
error correction.
In the Nautica series of products, TFTP is used to read or write a
Nautica configuration file, or write internal device codes.
TFTP is supported in the Nautica series with the Nautica Watch
software package.
IP security (IPSec) is a security mechanism designed to allow
both privacy of data (via encryption) and security of data (via
authentication). Two different mechanisms exist to allow IP data
to be passed over a network in a secure manner:
1. Transport mode: An extra field in the original IP frame
authenticates the header of a packet (Authentication Header
or AH mode).
2. Tunnel mode: The entire original IP frame is encrypted and
encapsulated in a new IP frame for transport across an
unsecured network (Encapsulating Security Protocol or
ESP).
NauticaRS5.5R only supports tunnel mode operation of IPSec.
The Nature of ESP mode IPSec requires that an entity forming
one end of a tunnel must have two distinct IP addresses:
• A public address at which tunnel data can be sentand
received
• A private address that is be used inside the tunnel.
117237-E Rev.00