ZyXEL Communications P-2602 manual VPN Screens 233, Secure Gateway Address field description

	P-2602H(W)(L)-DxA Series User’s Guide
Table 87 Edit VPN Policies
LABEL	DESCRIPTION
Peer ID Type	Select IP to identify the remote IPSec router by its IP address.
	Select DNS to identify the remote IPSec router by a domain name.
	Select E-mailto identify the remote IPSec router by an e-mail address.
Content	The configuration of the peer content depends on the peer ID type.
	For IP, type the IP address of the computer with which you will make the VPN
	connection. If you configure this field to 0.0.0.0 or leave it blank, the ZyXEL
	Device will use the address in the Secure Gateway Address field (refer to the
	Secure Gateway Address field description).
	For DNS or E-mail, type a domain name or e-mail address by which to identify the
	remote IPSec router. Use up to 31 ASCII characters including spaces, although
	trailing spaces are truncated. The domain name or e-mail address is for
	identification purposes only and can be any string.
	It is recommended that you type an IP address other than 0.0.0.0 or use the DNS
	or E-mailID type in the following situations:
	When there is a NAT router between the two IPSec routers.
	When you want the ZyXEL Device to distinguish between VPN connection
	requests that come in from remote IPSec routers with dynamic WAN IP
	addresses.
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. Set this field to 0.0.0.0 if the
	remote IPSec router has a dynamic WAN IP address (the Key Management field
	must be set to IKE).
	In order to have more than one active rule with the Secure Gateway Address
	field set to 0.0.0.0, the ranges of the local IP addresses cannot overlap between
	rules.
	If you configure an active rule with 0.0.0.0 in the Secure Gateway Address field
	and the LAN’s full IP address range as the local IP address, then you cannot
	configure any other active rules with the Secure Gateway Address field set to
	0.0.0.0.
Security Protocol
VPN 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 below).
Pre-Shared Key	Type your pre-shared key in this field. A pre-shared key identifies a
	communicating party during a phase 1 IKE negotiation. It is called "pre-shared"
	because you have to share it with another party before you can communicate with
	them over a secure connection.
	Type from 8 to 31 case-sensitive ASCII characters or from 16 to 62 hexadecimal
	("0-9", "A-F") characters. You must precede a hexadecimal key with a "0x” (zero
	x), which is not counted as part of the 16 to 62 character range for the key. For
	example, in "0x0123456789ABCDEF", “0x” denotes that the key is hexadecimal
	and “0123456789ABCDEF” is the key itself.
	Both ends of the VPN tunnel must use the same pre-shared key. You will receive
	a “PYLD_MALFORMED” (payload malformed) packet if the same pre-shared key
	is not used on both ends.

Chapter 17 VPN Screens 233