Cisco Systems WRVS4400NRF Manuale Utente

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Setting Up and Configuring the WRVS4400N Wireless-N Router
Configuring the VPN Settings
Cisco WRVS4400N Wireless-N Gigabit Security Router with VPN Administration Guide
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Setting Up IPSec
The IPSec Setup section of the VPN > IPSec VPN window displays the security 
parameters for configuring a VPN.
To set up IPSec for the router, follow these steps:
STEP 1
Click VPN > IPSec Setup.
STEP 2
Configure the security parameters for VPN IPSec:
Keying Mode
—The router supports both IKE with Preshared Key 
(automatic) and Manual key management. When choosing automatic key 
management, IKE (Internet Key Exchange) protocols are used to negotiate 
key material for SA. If manual key management is selected, no key 
negotiation is needed. Basically, manual key management is used in small 
static environments or for troubleshooting purpose. Notice that both sides 
must use the same Key Management method. 
Encryption
—The Encryption method determines the length of the key used 
to encrypt/decrypt ESP packets. 3DES is supported. Notice that both sides 
of the VPN tunnel must use the same Encryption method. 
Authentication
—Authentication determines a method to authenticate the 
ESP packets. Either MD5 or SHA1 may be selected. Both sides of the VPN 
tunnel must use the same Authentication method. 
-
MD5
—A one way hashing algorithm that produces a 128-bit digest. 
-
SHA1
—A one way hashing algorithm that produces a 160-bit digest. 
Preshared Key
— IKE uses the Pre-shared Key field to authenticate the 
remote IKE peer. Both character and hexadecimal value are acceptable in 
this field. for example; “My_@123” or “0x4d795f40313233.” Both sides must 
use the same Pre-shared Key. 
Key Lifetime
—Specifies the lifetime of the IKE generated key. If the time 
expires, a new key is renegotiated automatically. The Key Lifetime may range 
from 1081 to 86400 seconds. The default value for Phase 1 is 28800 
seconds, and default value for Phase 2 is 3600 seconds
Group
— For Diffie-Hellman key negotiation. There are 3 groups available for 
ISAKMP SA establishment, 768-bit, 1024-bit, 1536-bit represent different 
bits used in Diffie-Hellman mode operation. The default value is Group 768-
bit.