Nortel CONTIVITY 100 TRIPLE ETHERNET WITHOUT INTERNAL MODEM 仕様ガイド
The Contivity 100 offers a complete
set of site-to-site IP VPN features in a
compact, desktop packageincluding
secure access to the Internet (and
branch offices) through tunneling,
firewall protection, authentication
features, and encryption of data.
What makes the
Contivity 100 exceptional?
Low cost, secure tunneling
The Contivity 100 supports IPSec
branch tunnelseach one wrapping
the data stream within the format of
the IPSec protocol, thereby enabling
corporate communications to traverse
a private path on the public Internet.
Protection from hackers
The Contivity 100 supports firewalling
by proxy. This is a technique by which
a server funnels all user requests to
and from the Internet. By not open-
ing a straight path between two net-
works, firewalling by proxy prevents a
hacker from obtaining internal
addresses and details of the private
network and its users.
Access for authorized users only
The Contivity 100 accepts incoming
traffic through authenticated, tunneled
connections.
User authentication is provided
User authentication is provided
through SHA-1 (Secure Hash
Algorithm-1) or MD5 (Message
Digest 5)algorithms that create
digital signatures. Contivity 100 users
can choose the authentication method
best suited to their application require-
ments.
Furthermore, management and update
functions for the Contivity 100 are
protected by PAP (Password
Authentication Protocol) and CHAP
(Challenge Handshake Authentication
Protocol) security.
Both methods involve accessing a table
Both methods involve accessing a table
of user IDs and passwords on a server
to verifiy users when they log in.
CHAP provides increased security by
encrypting user IDs and passwords
before transmitting them to the verifi-
cation server.
Advanced encryption to
protect data traffic privacy
All Contivity 100 connections are
encrypted for privacy, using both DES
(Data Encryption Standard) and triple
DES with pre-shared keys.
DES is an efficient method that uses a
DES is an efficient method that uses a
56-bit encryption key. Triple DES
provides considerably more security by
using multiple keys to encrypt, decrypt,
and encrypt again.
secure VPN connectivity
Very low cost,
for small offices and home offices
Contivity 4500
Small office
with 10/100
Ethernet access
Contivity 2600
Contivity 15xx
Contivity 600
Contivity 100
Contivity 100
Contivity 100
Small
headquarters
(100 tunnels)
Medium
headquarters
(1000 tunnels)
Large
headquarters
(5000 tunnels)
Internet
HEADQUARTERS
Branch offices
(30 tunnels)
Home office
with dial-up access
Teleworker
with ISDN access
Analog
modem
Ethernet
interface device
ISDN network
termination
device