ZyXEL Communications EMG5324-D10A ユーザーズマニュアル

Chapter 17 VPN

EMG5324-D10A User’s Guide

With aggressive negotiation mode (see

), the Device identifies incoming 

SAs by ID type and content since this identifying information is not encrypted. This enables the 
Device to distinguish between multiple rules for SAs that connect from remote IPSec routers that 
have dynamic WAN IP addresses. Telecommuters can use separate passwords to simultaneously 
connect to the Device from IPSec routers with dynamic IP addresses (see

 for a telecommuter configuration example).

Regardless of the ID type and content configuration, the Device does not allow you to save multiple 
active rules with overlapping local and remote IP addresses.

With main mode (see

), the ID type and content are encrypted to 

provide identity protection. In this case the Device can only distinguish between up to 12 different 
incoming SAs that connect from remote IPSec routers that have dynamic WAN IP addresses. The 
Device can distinguish up to 12 incoming SAs because you can select between three encryption 
algorithms (DES, 3DES and AES), two authentication algorithms (MD5 and SHA1) and two key 
groups (DH1 and DH2) when you configure a VPN rule (see

). The ID type 

and content act as an extra level of identification for incoming SAs.

The type of ID can be a domain name, an IP address or an e-mail address. The content is the IP 
address, domain name, or e-mail address. 

Two IPSec routers must have matching ID type and content configuration in order to set up a VPN 
tunnel. 

Local ID Type and Content Fields

IP

Type the IP address of your computer or leave the field blank to have the Device 
automatically use its own IP address.

DNS

Type a domain name (up to 31 characters) by which to identify this Device.

E-mail

Type an e-mail address (up to 31 characters) by which to identify this Device.

The domain name or e-mail address that you use in the Content field is used for 
identification purposes only and does not need to be a real domain name or e-
mail address.

Peer ID Type and Content Fields

IP

Type the IP address of the computer with which you will make the VPN connection 
or leave the field blank to have the Device automatically use the address in the 
Secure Gateway Address field.

DNS

Type a domain name (up to 31 characters) by which to identify the remote IPSec 
router.

E-mail

Type an e-mail address (up to 31 characters) by which to identify the remote 
IPSec router.

The domain name or e-mail address that you use in the Content field is used for 
identification purposes only and does not need to be a real domain name or e-
mail address. The domain name also does not have to match the remote router’s 
IP address or what you configure in the Secure Gateway Address field below.