ZyXEL Communications P-2602 manual Viewing SA Monitor, VPN Screens

P-2602H(W)(L)-DxA Series User’s Guide

Table 89 VPN: Manual Key (continued)

LABEL	DESCRIPTION
My IP Address	Enter the WAN IP address of your ZyXEL Device. The VPN tunnel has to be
	rebuilt if this IP address changes.
	The following applies if this field is configured as 0.0.0.0:
	The ZyXEL Device uses the current ZyXEL Device WAN IP address (static or
	dynamic) to set up the VPN tunnel.
	If the WAN connection goes down, the ZyXEL Device uses the dial backup IP
	address for the VPN tunnel when using dial backup or the LAN IP address when
	using traffic redirect. See Chapter 7 on page 93 for details on dial backup and
	traffic redirect.
Secure Gateway	Type the WAN IP address or the URL (up to 31 characters) of the IPSec router
Address	with which you're making the VPN connection.
Security Protocol
IPSec Protocol	Select ESP if you want to use ESP (Encapsulation Security Payload). The ESP
	protocol (RFC 2406) provides encryption as well as some of the services offered
	by AH. If you select ESP here, you must select options from the Encryption
	Algorithm and Authentication Algorithm fields (described next).
Encryption	Select DES, 3DES or NULL from the drop-down list box.
Algorithm	When DES is used for data communications, both sender and receiver must know
	the same secret key, which can be used to encrypt and decrypt the message or to
	generate and verify a message authentication code. The DES encryption
	algorithm uses a 56-bit key. Triple DES (3DES) is a variation on DES that uses a
	168-bit key. As a result, 3DES is more secure than DES. It also requires more
	processing power, resulting in increased latency and decreased throughput.
	Select NULL to set up a tunnel without encryption. When you select NULL, you
	do not enter an encryption key.
Encapsulation Key	With DES, type a unique key 8 characters long. With 3DES, type a unique key 24
(only with ESP)	characters long. Any characters may be used, including spaces, but trailing
	spaces are truncated.
Authentication	Select SHA1 or MD5 from the drop-down list box. MD5 (Message Digest 5) and
Algorithm	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-1for maximum security.
Authentication Key	Type a unique authentication key to be used by IPSec if applicable. Enter 16
	characters for MD5 authentication or 20 characters for SHA-1authentication. Any
	characters may be used, including spaces, but trailing spaces are truncated.
Back	Click Back to return to the previous screen.
Apply	Click Apply to save your changes back to the ZyXEL Device.

17.16 Viewing SA Monitor

Click Security, VPN and Monitor to open the SA Monitor screen as shown. Use this screen to display and manage active VPN connections.

A Security Association (SA) is the group of security settings related to a specific VPN tunnel. This screen displays active VPN connections. Use Refresh to display active VPN connections. This screen is read-only. The following table describes the fields in this tab.

242 Chapter 17 VPN Screens