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SIEMENS 5890 DSL Router
User's Guide
3. Select one of the following security protocols:
•
AH (Authentication Header ) method, a security protocol that authenticates the sender of each data
packet. If the AH protocol is selected, only packet authentication can be performed, not encryption. To
select AH as the authentication method, select one of the following to use as the hashing algorithm for
AH authentication from the AH Authentication Scheme drop-down menu:
-
NONE: Requests no AH encapsulation.
-
MD5: Requests AH encapsulation and authenticates using Message Digest 5.
-
SHA1: Requests AH encapsulation and authenticates using Secure Hashing Algorithm 1.
•
ESP (Encapsulating Security Payload) method, a security protocol that completely encapsulates and
optionally encrypts user data and/or authenticates the sender of each data packet. If the ESP protocol is
selected, encryption, authentication, or both encryption and authentication can be performed.. To select
ESP as the authentication method, select one of the following to use as the hashing algorithm hashing
algorithm for ESP authentication from the ESP Authentication Scheme drop-down menu.
-
NONE: Requests no ESP encapsulation.
-
MD5: Requests ESP encapsulation and authenticates using Message Digest 5.
-
SHA1: Requests ESP encapsulation and authenticates using Secure Hashing Algorithm 1.
4. If you selected ESP authentication, select one of the following from the ESP Encryption Type drop-down
menu to specify the algorithm to use to encrypt ESP IPSec packets:
-
DES: Encrypts using a 56-bit key.
-
3DES: Encrypts using three 56-bit keys to produce 168-bit encryption.
-
NULL: ESP encapsulation, but no data encryption. ESP encapsulation verifies the source, but data is
sent in the clear to increase throughput.
-
NONE: No ESP encapsulation and no encryption is used.
5. From the IP Compression Method drop-down menu, select one of the following to specify the algorithm to
to use to compress IPSec packets: LZS IP compression or None.
6. In Phase II Proposal Lifetime, enter the number of seconds after the IPSec SA expires. The default is
1800 seconds. Once this time is elapsed, the system will renegotiate the IKE connection.
7. In Phase II Proposal Life Data, enter the amount of data, measured in kilobytes, before the IPSec SA
terminates. After the specified quantity of data has been transferred, the system will renegotiate the IKE
connection. If zero is entered, the data quantity will be unlimited. By setting a limit on the amount of data
transferred, the risk of a key becoming compromised is reduced.
8. Click Apply.
SIEMENS
Chapter 6 Security Setup
IKE/IPSec Configuration
85
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