P-2608HWL-Dx Series User’s Guide
240
Chapter 18 IPSec VPN
18.5 Configuring Manual Key
You only configure
VPN Manual Key
when you select
Manual
in the
IPSec Key Mode
field
on the
VPN IKE
screen. This is the
VPN Manual Key
screen as shown next.
Authentication
Algorithm
Select
SHA1
or
MD5
from the drop-down list box. MD5 (Message Digest 5) and
SHA1 (Secure Hash Algorithm) are hash algorithms used to authenticate packet
data. The SHA1 algorithm is generally considered stronger than MD5, but is
slower. Select
MD5
for minimal security and
SHA-1
for maximum security.
SA Life Time
(Seconds)
Define the length of time before an IKE SA automatically renegotiates in this field.
It may range from 60 to 3,000,000 seconds (almost 35 days).
A short SA Life Time increases security by forcing the two VPN gateways to
update the encryption and authentication keys. However, every time the VPN
tunnel renegotiates, all users accessing remote resources are temporarily
disconnected.
Encapsulation Select
Tunnel
mode or
Transport
mode from the drop-down list box.
Perfect Forward
Secrecy (PFS)
Perfect Forward Secrecy (PFS) is disabled (
NONE
) by default in phase 2 IPSec
SA setup. This allows faster IPSec setup, but is not so secure. Choose
DH1
or
DH2
from the drop-down list box to enable PFS.
DH1
refers to Diffie-Hellman
Group 1 a 768 bit random number.
DH2
refers to Diffie-Hellman Group 2 a 1024
bit (1Kb) random number (more secure, yet slower).
Back
Click
Back
to return to the previous screen.
Apply
Click
Apply
to save your changes back to the ZyXEL Device and return to the
VPN-IKE
screen.
Cancel
Click
Cancel
to clear your changes.
Table 85
Advanced VPN Policies
LABEL
DESCRIPTION
Содержание P-2608HWL-D1
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Страница 7: ...P 2608HWL Dx Series User s Guide Safety Warnings 7 This product is recyclable Dispose of it properly ...
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Страница 44: ...P 2608HWL Dx Series User s Guide 44 Chapter 1 Getting To Know the ZyXEL Device ...
Страница 66: ...P 2608HWL Dx Series User s Guide 66 Chapter 3 Internet and Wireless Setup Wizard ...
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Страница 257: ...P 2608HWL Dx Series User s Guide Chapter 19 Certificates 257 Figure 138 My Certificate Details ...
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Страница 318: ...P 2608HWL Dx Series User s Guide 318 Chapter 24 Universal Plug and Play UPnP ...
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Страница 378: ...P 2608HWL Dx Series User s Guide 378 Appendix B Setting up Your Computer s IP Address ...
Страница 402: ...P 2608HWL Dx Series User s Guide 402 Appendix F Triangle Route ...
Страница 440: ...P 2608HWL Dx Series User s Guide 440 Appendix H Internal SPTGEN ...