Chapter 21 IPSec
VSG1432-B101 Series User’s Guide
262
Finally, NAT is compatible with ESP in tunnel mode because integrity checks are
performed over the combination of the "original header plus original payload,"
which is unchanged by a NAT device. The compatibility of AH and ESP with NAT in
tunnel and transport modes is summarized in the following table.
Y* - This is supported in the ZyXEL Device if you enable NAT traversal.
21.4.7 ID Type and Content
With aggressive negotiation mode (see
Section 21.4.4 on page 260
), 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.
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 21.4.4 on page 260
), 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 48 incoming SAs because you can select between three
encryption algorithms (DES, 3DES and AES), two authentication algorithms (MD5
and SHA1) and eight key groups when you configure a VPN rule (see
Section 21.3
on page 248
). 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.
Table 90
VPN and NAT
SECURITY
PROTOCOL
MODE
NAT
AH
Transport
N
AH
Tunnel
N
ESP
Transport
Y*
ESP
Tunnel
Y
Table 91
Local ID Type and Content Fields
LOCAL ID
TYPE=
CONTENT=
IP
Type the IP address of your computer.
DNS
Type a domain name (up to 31 characters) by which to identify this
ZyXEL Device.
Содержание VSG1432-B101 - V1.10
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Страница 8: ...Safety Warnings VSG1432 B101 Series User s Guide 8 ...
Страница 10: ...Contents Overview VSG1432 B101 Series User s Guide 10 ...
Страница 20: ...Table of Contents VSG1432 B101 Series User s Guide 20 ...
Страница 21: ...21 PART I User s Guide ...
Страница 22: ...22 ...
Страница 40: ...Chapter 2 The Web Configurator VSG1432 B101 Series User s Guide 40 ...
Страница 67: ...67 PART II Technical Reference ...
Страница 68: ...68 ...
Страница 74: ...Chapter 5 Network Map and Status Screens VSG1432 B101 Series User s Guide 74 ...
Страница 146: ...Chapter 8 Home Networking VSG1432 B101 Series User s Guide 146 ...
Страница 150: ...Chapter 9 Static Routing VSG1432 B101 Series User s Guide 150 ...
Страница 174: ...Chapter 11 Policy Forwarding VSG1432 B101 Series User s Guide 174 ...
Страница 192: ...Chapter 12 Network Address Translation NAT VSG1432 B101 Series User s Guide 192 ...
Страница 198: ...Chapter 13 Dynamic DNS Setup VSG1432 B101 Series User s Guide 198 ...
Страница 224: ...Chapter 16 Firewall VSG1432 B101 Series User s Guide 224 ...
Страница 230: ...Chapter 18 Parental Control VSG1432 B101 Series User s Guide 230 ...
Страница 278: ...Chapter 25 Traffic Status VSG1432 B101 Series User s Guide 278 ...
Страница 282: ...Chapter 26 IGMP Status VSG1432 B101 Series User s Guide 282 ...
Страница 290: ...Chapter 28 Remote Management VSG1432 B101 Series User s Guide 290 ...
Страница 294: ...Chapter 29 Time Settings VSG1432 B101 Series User s Guide 294 ...
Страница 298: ...Chapter 30 Logs Setting VSG1432 B101 Series User s Guide 298 ...
Страница 314: ...Chapter 34 Troubleshooting VSG1432 B101 Series User s Guide 314 ...
Страница 344: ...Appendix A Setting up Your Computer s IP Address VSG1432 B101 Series User s Guide 344 ...
Страница 354: ...Appendix B IP Addresses and Subnetting VSG1432 B101 Series User s Guide 354 ...
Страница 364: ...Appendix C Pop up Windows JavaScripts and Java Permissions VSG1432 B101 Series User s Guide 364 ...
Страница 380: ...Appendix D Wireless LANs VSG1432 B101 Series User s Guide 380 ...
Страница 408: ...Index VSG1432 B101 Series User s Guide 408 ...