ZyXEL P-661H-D1 User Guide - Page 235

ID Type and Content,

Page 235 highlights

Chapter 16 VPN DNS server in headquarters. The DNS server feature for VPN does not work with Windows 2000 or Windows XP. Figure 105 VPN Host using Intranet DNS Server Example ISP DNS Servers 212.54.64.170 212.54.54.171 1 LAN DNS:212.54.64.170 212.54.64.171 Remote IPSec Router HQ 10.1.1.1/200 A VPN DNS: 10.1.1.10 Intranet DNS 10.1.1.10 = VPN Tunnel 2 192.168.1.1/50 3 172.16.1.1/50 If you do not specify an Intranet DNS server on the remote network, then the VPN host must use IP addresses to access the computers on the remote network. 16.6.8 ID Type and Content With aggressive negotiation mode (seeSection 16.6.6 on page 234), the ZyXEL Device identifies incoming SAs by ID type and content since this identifying information is not encrypted. This enables the ZyXEL 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 ZyXEL Device from IPSec routers with dynamic IP addresses (seeSection 16.6.11 on page 237 for a telecommuter configuration example). Regardless of the ID type and content configuration, the ZyXEL Device does not allow you to save multiple active rules with overlapping local and remote IP addresses. With main mode (seeSection 16.6.6 on page 234), the ID type and content are encrypted to provide identity protection. In this case the ZyXEL Device can only distinguish between up to 12 different incoming SAs that connect from remote IPSec routers that have dynamic WAN IP addresses. The ZyXEL 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 P-661HNU-Fx User's Guide 235

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Chapter 16 VPN
P-661HNU-Fx User’s Guide
235
DNS server in headquarters. The DNS server feature for VPN does not work with
Windows 2000 or Windows XP.
Figure 105
VPN Host using Intranet DNS Server Example
If you do not specify an Intranet DNS server on the remote network, then the VPN
host must use IP addresses to access the computers on the remote network.
16.6.8
ID Type and Content
With aggressive negotiation mode (see
Section 16.6.6 on page 234
), the ZyXEL
Device identifies incoming SAs by ID type and content since this identifying
information is not encrypted. This enables the ZyXEL 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 ZyXEL Device from IPSec routers with dynamic IP
addresses (see
Section 16.6.11 on page 237
for a telecommuter configuration
example).
Regardless of the ID type and content configuration, the ZyXEL Device does not
allow you to save multiple active rules with overlapping local and remote IP
addresses.
With main mode (see
Section 16.6.6 on page 234
), the ID type and content are
encrypted to provide identity protection. In this case the ZyXEL Device can only
distinguish between up to 12 different incoming SAs that connect from remote
IPSec routers that have dynamic WAN IP addresses. The ZyXEL 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
Remote
IPSec Router
HQ
10.1.1.1/200
Intranet DNS
10.1.1.10
ISP DNS Servers
212.54.64.170
212.54.54.171
LAN
DNS:212.54.64.170
212.54.64.171
A
VPN DNS: 10.1.1.10
= VPN Tunnel
2
192.168.1.1/50
3
172.16.1.1/50
1