ZyXEL Communications Prestige 652 User Manual page 278

Prestige 652 ADSL Security Router
FIELD
public static IP address.
When the secure gateway IP address is 0.0.0.0 (as discussed in the last
chapter), there may be different connections using this same VPN rule. In
this case, the name is followed by the remote IP address as configured in
Menu 27.1.1. – IPSec Setup. Individual connections using the same VPN
rule may be terminated without affecting other connections using the same
rule.
This field displays Tunnel mode or Transport mode. See previous for
Encap.
discussion.
IPSec This field displays the security protocols used for an SA. ESP provides
ALgorithm confidentiality and integrity of data by encrypting the data and
encapsulating it into IP packets. Encryption methods include 56-bit DES
and 168-bit 3DES. NULL denotes a tunnel without encryption.
An incoming SA may have an AH in addition to ESP. The Authentication
Header provides strong integrity and authentication by adding
authentication information to IP packets. This authentication information is
calculated using header and payload data in the IP packet. This provides
an additional level of security. AH choices are MD5 (default - 128 bits)
and SHA -1(160 bits).
Both AH and ESP increase Prestige processing requirements and
communications latency (delay).
Press [SPACE BAR] to choose from Refresh, Disconnect or None and
Select
Command then press [ENTER]. You must select a connection in the next field when
you choose the Disconnect command. Refresh displays current active
VPN connections. None allows you to jump to the "Press ENTER to
Confirm..." prompt.
Select Type the VPN connection index number that you want to disconnect and
Connection then press [ENTER].
When you have completed this menu, press [ENTER] at the prompt "Press ENTER to Confirm..." to save your
configuration, or press [ESC] at any time to cancel.
26-2
Table 26-1 Menu 27.2 — SA Monitor
DESCRIPTION EXAMPLE
Tunnel
ESP DES MD5
Refresh
1
SA Monitor