Version 6.2
263
February 2011
SIP User's Manual
3. Web-Based Management
Services supported by the IPSec protocols (AH, ESP) include confidentiality (encryption),
authenticity (proof of sender), integrity (detection of data tampering), and replay protection
(defense against unauthorized resending of data). IPSec also specifies methodologies for
key management. Internet Key Exchange (IKE), the IPSec key management protocol,
defines a series of steps to establish keys for encrypting and decrypting information; it
defines a common language on which communications between two parties is based.
Developed by the Internet Engineering Task Force (IETF), IPSec and IKE together
standardize the way data protection is performed, thus making it possible for security
systems developed by different vendors to interoperate.
¾
To configure IPSec:
1.
Click the
IPSec
item (
Configuration
tab >
Data
menu >
VPN
submenu >
IPSec
); the
following page appears:
Figure
3-173: Configuring VPN IPSec
The 'Connections' group displays a list of IPSec connections (to create an IPSec
connection, see ''Configuring Network Connections'' on page
2.
To block unauthorized IP to the device, perform the following:
a.
Select the 'Block Unauthorized IP' check box.
b.
In the 'Maximum Number of Authentication Failures' field, enter the maximum
number of packets to authenticate before blocking the origin's IP address.
c.
In the 'Block Period' field, enter the time frame during which the device drops
packets from an unauthorized IP address.
3.
To enable dropping of packets that are recognized (by their sequence number) as
already been received, select the 'Anti-Replay Protection' check box.
4.
Configure the device's IPSec public keys:
a.
Click the
Settings
button; the following page appears.
Figure
3-174: Recreating IPSec Public Key
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