ZyWALL 2 Series User’s Guide
VPN/IPSec Setup
37-3
Table 37-1 Menu 27.1: IPSec Summary
FIELD DESCRIPTION EXAMPLE
Name
This field displays the unique identification name for this VPN rule. The
name may be up to 32 characters long but only 10 characters will be
displayed here.
Taiwan
A
Y
signifies that this VPN rule is active.
Y
Local Addr
Start
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
Single
, this is a static IP address on the LAN behind your ZyWALL.
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
Range
, this is the beginning (static) IP address, in a range of computers
on the LAN behind your ZyWALL.
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
SUBNET
, this is a static IP address on the LAN behind your ZyWALL.
192.168.1.35
Addr End /
Mask
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
Single
, this is the same (static) IP address as in the
Local Addr Start
field.
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
Range
, this is the end (static) IP address, in a range of computers on the
LAN behind your ZyWALL.
When the
Addr Type
field in
Menu 27.1.1 IPSec Setup
is configured to
SUBNET
, this is a subnet mask on the LAN behind your ZyWALL.
192.168.1.38
Encap
This field displays
Tunnel
mode
or
Transport
mode. See earlier for a
discussion of these. You need to finish configuring the VPN policy in menu
27.1.1.1 or 27.1.1.2 if
???
is displayed.
Tunnel
IPSec
Algorithm
This field displays the security protocols used for an SA.
ESP
provides
confidentiality and integrity of data by encrypting the data and
encapsulating it into IP packets. Encryption methods include 56-bit
DES
,
168-bit
3DES
and 128-bit
AES
.
NULL
denotes a tunnel without
encryption.
AH
(Authentication Header) provides strong integrity and authentication
by adding authentication information to IP packets. This authentication
information is calculated using header and payload data in the IP packet.
This provides an additional level of security.
AH
choices are
MD5
(default
- 128 bits) and
SHA -1
(160 bits)
.
Both
AH
and
ESP
increase the ZyWALL’s processing requirements and
communications latency (delay).
You need to finish configuring the VPN policy in menu 27.1.1.1 or 27.1.1.2
if
???
is displayed.
ESP DES MD5