Chapter 16 VPN
ADSL Series User’s Guide
217
16.6.6 Negotiation Mode
The phase 1 Negotiation Mode you select determines how the Security Association (SA) will be
established for each connection through IKE negotiations.
• Main Mode ensures the highest level of security when the communicating parties are
negotiating authentication (phase 1). It uses 6 messages in three round trips: SA negotiation,
Diffie-Hellman exchange and an exchange of nonces (a nonce is a random number). This mode
features identity protection (your identity is not revealed in the negotiation).
16.6.7 Remote DNS Server
In cases where you want to use domain names to access Intranet servers on a remote network that
has a DNS server, you must identify that DNS server. You cannot use DNS servers on the LAN or
from the ISP since these DNS servers cannot resolve domain names to private IP addresses on the
remote network
The following figure depicts an example where three VPN tunnels are created from ZyXEL Device A;
one to branch office 2, one to branch office 3 and another to headquarters. In order to access
computers that use private domain names on the headquarters (HQ) network, the ZyXEL Device at
branch office 1 uses the Intranet DNS server in headquarters. The DNS server feature for VPN does
not work with Windows 2000 or Windows XP.
Figure 114
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.
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
Содержание P-660HN-F1
Страница 2: ...Videos ADSL Series User s Guide 2 Videos File Sharing Video Example 55 QoS Video Example 76...
Страница 6: ...Document Conventions ADSL Series User s Guide 6 Server Firewall Router Switch...
Страница 8: ...Safety Warnings ADSL Series User s Guide 8...
Страница 10: ...Contents Overview ADSL Series User s Guide 10...
Страница 19: ...19 PART I User s Guide...
Страница 20: ...20...
Страница 26: ...Chapter 1 Introduction ADSL Series User s Guide 26...
Страница 40: ...Chapter 2 Introducing the Web Configurator ADSL Series User s Guide 40...
Страница 80: ...Chapter 3 Tutorials ADSL Series User s Guide 80...
Страница 81: ...81 PART II Technical Reference...
Страница 82: ...82...
Страница 130: ...Chapter 6 Wireless ADSL Series User s Guide 130...
Страница 160: ...Chapter 8 Routing ADSL Series User s Guide 160...
Страница 164: ...Chapter 9 DNS Route ADSL Series User s Guide 164...
Страница 182: ...Chapter 11 Network Address Translation NAT ADSL Series User s Guide 182...
Страница 190: ...Chapter 13 Firewall ADSL Series User s Guide 190...
Страница 202: ...Chapter 15 Certificates ADSL Series User s Guide 202...
Страница 222: ...Chapter 16 VPN ADSL Series User s Guide 222...
Страница 226: ...Chapter 17 System Monitor ADSL Series User s Guide 226...
Страница 228: ...Chapter 18 User Account ADSL Series User s Guide 228...
Страница 242: ...Chapter 24 Backup Restore ADSL Series User s Guide 242...
Страница 246: ...Chapter 25 Diagnostic ADSL Series User s Guide 246...
Страница 254: ...Chapter 26 Troubleshooting ADSL Series User s Guide 254...
Страница 262: ...Chapter 27 Product Specifications ADSL Series User s Guide 262...
Страница 302: ...Appendix B Setting Up Your Computer s IP Address ADSL Series User s Guide 302...
Страница 310: ...Appendix C Pop up Windows Java Script and Java Permissions ADSL Series User s Guide 310...
Страница 334: ...Appendix E Common Services ADSL Series User s Guide 334...
Страница 355: ...Appendix F Open Software Announcements ADSL Series User s Guide 355...
Страница 356: ...Appendix F Open Software Announcements ADSL Series User s Guide 356...
Страница 360: ...Appendix G Legal Information ADSL Series User s Guide 360...