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P-202H Plus v2 User’s Guide

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Chapter 34 SA Monitor

The following table describes the fields in this menu.

Table 105   Menu 27.2 SA Monitor

#

This is the security  index number.

Name

This field displays the identification name for this VPN policy. This name is unique for 

each connection where the secure gateway IP address is a 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.

Encap.

This field displays Tunnel mode or Transport mode. See previous for discussion.

IPSec 

ALgorithm

This field displays the security protocols used for an SA. ESP provides 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 ZyXEL Device processing requirements and communications 

latency (delay).

Select 

Command

Press [SPACE BAR] to choose from Refresh, Disconnect or None and 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 

Connection

Type the VPN connection index number that you want to disconnect and 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.