ZyWALL / USG (ZLD) CLI Reference Guide
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IPSec VPN
This chapter explains how to set up and maintain IPSec VPNs in the ZyWALL / USG.
28.1 IPSec VPN Overview
A virtual private network (VPN) provides secure communications between sites without the expense
of leased site-to-site lines. A secure VPN is a combination of tunneling, encryption, authentication,
access control and auditing. It is used to transport traffic over the Internet or any insecure network
that uses TCP/IP for communication.
Internet Protocol Security (IPSec) is a standards-based VPN that offers flexible solutions for secure
data communications across a public network like the Internet. IPSec is built around a number of
standardized cryptographic techniques to provide confidentiality, data integrity and authentication
at the IP layer.
The following figure is one example of a VPN tunnel.
Figure 19
VPN: Example
The VPN tunnel connects the ZyWALL / USG (
X
) and the remote IPSec router (
Y
). These routers
then connect the local network (
A
) and remote network (
B
).
A VPN tunnel is usually established in two phases. Each phase establishes a security association
(SA), a contract indicating what security parameters the ZyWALL / USG and the remote IPSec
router will use. The first phase establishes an Internet Key Exchange (IKE) SA between the ZyWALL
/ USG and remote IPSec router. The second phase uses the IKE SA to securely establish an IPSec
Содержание ZyWALL USG Series
Страница 19: ...19 PART I Introduction ...
Страница 20: ...20 ...
Страница 38: ...Chapter 2 User and Privilege Modes ZyWALL USG ZLD CLI Reference Guide 38 ...
Страница 39: ...39 PART II Reference ...
Страница 40: ...40 ...
Страница 48: ...Chapter 4 Status ZyWALL USG ZLD CLI Reference Guide 48 ...
Страница 52: ...Chapter 5 Registration ZyWALL USG ZLD CLI Reference Guide 52 ...
Страница 128: ...Chapter 15 Route ZyWALL USG ZLD CLI Reference Guide 128 ...
Страница 136: ...Chapter 17 Zones ZyWALL USG ZLD CLI Reference Guide 136 ...
Страница 140: ...Chapter 18 DDNS ZyWALL USG ZLD CLI Reference Guide 140 ...
Страница 148: ...Chapter 20 HTTP Redirect ZyWALL USG ZLD CLI Reference Guide 148 ...
Страница 152: ...Chapter 21 ALG ZyWALL USG ZLD CLI Reference Guide 152 ...
Страница 156: ...Chapter 22 UPnP ZyWALL USG ZLD CLI Reference Guide 156 ...
Страница 159: ...Chapter 23 IP MAC Binding ZyWALL USG ZLD CLI Reference Guide 159 ...
Страница 178: ...Chapter 25 Secure Policy ZyWALL USG ZLD CLI Reference Guide 178 ...
Страница 218: ...Chapter 32 Application Patrol ZyWALL USG ZLD CLI Reference Guide 218 ...
Страница 236: ...Chapter 34 IDP Commands ZyWALL USG ZLD CLI Reference Guide 236 ...
Страница 246: ...Chapter 35 Content Filtering ZyWALL USG ZLD CLI Reference Guide 246 ...
Страница 256: ...Chapter 36 Anti Spam ZyWALL USG ZLD CLI Reference Guide 256 ...
Страница 262: ...Chapter 37 SSL Inspection ZyWALL USG ZLD CLI Reference Guide 262 ...
Страница 268: ...Chapter 38 Device HA ZyWALL USG ZLD CLI Reference Guide 268 ...
Страница 284: ...Chapter 41 Addresses ZyWALL USG ZLD CLI Reference Guide 284 ...
Страница 288: ...Chapter 42 Services ZyWALL USG ZLD CLI Reference Guide 288 ...
Страница 302: ...Chapter 46 Authentication Server ZyWALL USG ZLD CLI Reference Guide 302 ...
Страница 338: ...Chapter 52 System Remote Management ZyWALL USG ZLD CLI Reference Guide 338 ...
Страница 358: ...Chapter 53 File Manager ZyWALL USG ZLD CLI Reference Guide 358 ...
Страница 372: ...Chapter 56 Session Timeout ZyWALL USG ZLD CLI Reference Guide 372 ...
Страница 374: ...Chapter 57 Diagnostics ZyWALL USG ZLD CLI Reference Guide 374 ...
Страница 384: ...Chapter 59 Maintenance Tools ZyWALL USG ZLD CLI Reference Guide 384 ...
Страница 426: ...List of Commands Alphabetical ZyWALL USG ZLD CLI Reference Guide 426 ...