Chapter 21 IPSec VPN
USG20(W)-VPN Series User’s Guide
343
Proposal
Use this section to manage the encryption algorithm and authentication algorithm
pairs the USG accepts from the remote IPSec router for negotiating the IPSec SA.
Add
Click this to create a new entry.
Edit
Select an entry and click this to be able to modify it.
Remove
Select an entry and click this to delete it.
#
This field is a sequential value, and it is not associated with a specific proposal. The
sequence of proposals should not affect performance significantly.
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 USG 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
,
SHA256
,
SHA512
and
MD5
. SHA is generally considered
stronger than
MD5
, but it is also slower.
The USG and the remote IPSec router must both have a proposal that uses the same
authentication algorithm.
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.
PFS is ignored in initial IKEv2 authentication but is used when reauthenticating.
Related Settings
Zone
Select the security zone into which to add this VPN connection policy. Any security
rules or settings configured for the selected zone apply to this VPN connection policy.
Connectivity Check
The USG can regularly check the VPN connection to the gateway you specified to
make sure it is still available.
Enable
Connectivity Check
Select this to turn on the VPN connection check.
Table 135
Configuration > VPN > IPSec VPN > VPN Connection > Edit (continued)
LABEL
DESCRIPTION
Содержание ZyWall USG20-VPN
Страница 17: ...17 PART I User s Guide ...
Страница 18: ...18 ...
Страница 99: ...99 PART II Technical Reference ...
Страница 100: ...100 ...
Страница 151: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 151 Configuration Network Interface Ethernet Edit External Type ...
Страница 152: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 152 Configuration Network Interface Ethernet Edit External Type ...
Страница 154: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 154 Configuration Network Interface Ethernet Edit Internal Type ...
Страница 155: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 155 Figure 121 Configuration Network Interface Ethernet Edit OPT ...
Страница 156: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 156 Configuration Network Interface Ethernet Edit OPT ...
Страница 170: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 170 Figure 127 Configuration Network Interface PPP Add ...
Страница 178: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 178 Figure 129 Configuration Network Interface Cellular Add Edit ...
Страница 194: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 194 Figure 139 Configuration Network Interface VLAN Add Edit ...
Страница 206: ...Chapter 9 Interfaces USG20 W VPN Series User s Guide 206 Figure 141 Configuration Network Interface Bridge Add Edit ...
Страница 282: ...Chapter 15 UPnP USG20 W VPN Series User s Guide 282 Figure 190 Network Connections My Network Places Properties Example ...
Страница 340: ...Chapter 21 IPSec VPN USG20 W VPN Series User s Guide 340 Figure 226 Configuration VPN IPSec VPN VPN Connection Edit IKE ...
Страница 348: ...Chapter 21 IPSec VPN USG20 W VPN Series User s Guide 348 Figure 228 Configuration VPN IPSec VPN VPN Gateway Add Edit ...
Страница 378: ...Chapter 22 SSL VPN USG20 W VPN Series User s Guide 378 Create a Web Application SSL Application Object ...
Страница 591: ...Chapter 31 Log and Report USG20 W VPN Series User s Guide 591 Figure 418 Configuration Log Report Email Daily Report ...
Страница 659: ...Appendix B Legal Information USG20 W VPN Series User s Guide 659 Environmental Product Declaration ...