Chapter 11 IPSec VPN
Vantage CNM User’s Guide
328
Encryption
This field is applicable when the Active Protocol is ESP. Select which
key size and encryption algorithm to use in the IPSec SA. Choices
are:
NULL - no encryption key or algorithm
DES - a 56-bit key with the DES encryption algorithm
3DES - a 168-bit key with the DES encryption algorithm
AES128 - a 128-bit key with the AES encryption algorithm
AES192 - a 192-bit key with the AES encryption algorithm
AES256 - a 256-bit key with the AES encryption algorithm
The ZyWALL and the remote IPSec router must both have at least one
proposal that uses use the same encryption and the same key.
Longer keys are more secure, but require more processing power,
resulting in increased latency and decreased throughput.
Authentication
Select which hash algorithm to use to authenticate packet data in the
IPSec SA. Choices are SHA1 and MD5. SHA1 is generally considered
stronger than MD5, but it is also slower.
The ZyWALL and the remote IPSec router must both have a proposal
that uses the same authentication algorithm.
Add icon
This column contains icons to add and remove proposals.
To add a proposal, click the Add icon at the top of the column.
To remove a proposal, click the Remove icon next to the proposal.
The Vantage CNM confirms that you want to delete it before doing so.
Total Records
This field displays the total number of proposals to use in the IPSec
SA.
SA Life Time
Type the maximum number of seconds the IPSec SA can last. Shorter
life times provide better security. The ZyWALL automatically
negotiates a new IPSec SA before the current one expires, if there are
users who are accessing remote resources.
Perfect
Forward
Secrecy (PFS)
Select whether or not you want to enable Perfect Forward Secrecy
(PFS) and, if you do, which Diffie-Hellman key group to use for
encryption. Choices are:
NONE - disable PFS
DH1 - enable PFS and use a 768-bit random number
DH2 - enable PFS and use a 1024-bit random number
DH5 - enable PFS and use a 1536-bit random number
PFS changes the root key that is used to generate encryption keys for
each IPSec SA. The longer the key, the more secure the encryption,
but also the longer it takes to encrypt and decrypt information. Both
routers must use the same DH key group.
Table 130
Device Operation > Device Configuration > VPN > IPSec VPN > VPN
Connection > Add/Edit (IKE) (continued)
LABEL
DESCRIPTION
Summary of Contents for VANTAGE CNM
Page 2: ......
Page 20: ...New Template User s Guide 20...
Page 23: ...23 PART I Introduction Introducing Vantage CNM 21 GUI Introduction 25...
Page 24: ...24...
Page 46: ...46...
Page 50: ...Chapter 3 Load or Save Building Blocks BB Vantage CNM User s Guide 50...
Page 140: ...Chapter 6 Device Security Settings Vantage CNM User s Guide 140 IKE Gateway Policy Add Edit...
Page 242: ...Chapter 8 Device Log Vantage CNM User s Guide 242...
Page 246: ...246...
Page 346: ...Chapter 11 IPSec VPN Vantage CNM User s Guide 346...
Page 356: ...Chapter 13 L2TP VPN Vantage CNM User s Guide 356...
Page 384: ...Chapter 14 Vantage CNM User s Guide 384...
Page 408: ...408...
Page 456: ...Chapter 18 Firmware Management Vantage CNM User s Guide 456...
Page 474: ...474...
Page 494: ...494...
Page 534: ...Chapter 26 Device Alarm Vantage CNM User s Guide 534...
Page 535: ...535 PART VII Log Report Device Operation Report 537 CNM Logs 553 VRPT 555...
Page 536: ...536...
Page 552: ...Chapter 27 Device Operation Report Vantage CNM User s Guide 552...
Page 560: ...560...
Page 580: ...Chapter 30 CNM System Setting Vantage CNM User s Guide 580...
Page 588: ...Chapter 33 Vantage CNM Software Upgrade Vantage CNM User s Guide 588...
Page 592: ...Chapter 35 About CNM Vantage CNM User s Guide 592...
Page 593: ...593 PART IX Account Management User Group 595 Account 599...
Page 594: ...594...
Page 598: ...Chapter 36 User Group Vantage CNM User s Guide 598...
Page 603: ...603 PART X Troubleshooting Troubleshooting 605...
Page 604: ...604...
Page 610: ...610...
Page 616: ...Appendix A Product Specifications Vantage CNM User s Guide 616...
Page 634: ...Appendix B Setting up Your Computer s IP Address Vantage CNM User s Guide 634...
Page 656: ...Appendix E IP Address Assignment Conflicts Vantage CNM User s Guide 656...
Page 666: ...Appendix G Importing Certificates Vantage CNM User s Guide 666...