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Chapter 23 IPSec VPN
ZyWALL USG 50 User’s Guide
383
Manual Key Select this option to configure a VPN connection policy that uses a
manual key instead of IKE key management. This may be useful if
you have problems with IKE key management. See Section 23.2.2 on
page 387 for how to configure the manual key fields.
Note: Only use manual key as a temporary solution, because it is
not as secure as a regular IPSec SA.
Policy
Local Policy Select the address corresponding to the local network. Use Create
new Object if you need to configure a new one.
Remote Policy Select the address corresponding to the remote network. Use Create
new Object if you need to configure a new one.
Policy
Enforcement
Clear this to allow traffic with source and destination IP addresses
that do not match the local and remote policy to use the VPN tunnel.
Leave this cleared for free access between the local and remote
networks.
Selecting this restricts who can use the VPN tunnel. The ZyWALL
drops traffic with source and destination IP addresses that do not
match the local and remote policy.
Phase 2 Settings
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.
Active Protocol Select which protocol you want to use in the IPSec SA. Choices are:
AH (RFC 2402) - provides integrity, authentication, sequence
integrity (replay resistance), and non-repudiation but not encryption.
If you select AH, you must select an Authentication algorithm.
ESP (RFC 2406) - provides encryption and the same services offered
by AH, but its authentication is weaker. If you select ESP, you must
select an Encryption algorithm and Authentication algorithm.
Both AH and ESP increase processing requirements and latency
(delay).
The ZyWALL and remote IPSec router must use the same active
protocol.
Encapsulation Select which type of encapsulation the IPSec SA uses. Choices are
Tunnel - this mode encrypts the IP header information and the data.
Transport - this mode only encrypts the data.
The ZyWALL and remote IPSec router must use the same
encapsulation.
Proposal
Add Click this to create a new entry.
Edit Select an entry and click this to be able to modify it.
Table 113 Configuration > VPN > IPSec VPN > VPN Connection > Edit (continued)
LABEL DESCRIPTION