ZyXEL P-662H-D3 User Guide - Page 233
IKE Phases
View all ZyXEL P-662H-D3 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 233 highlights
Chapter 16 VPN Screens Table 93 Edit VPN Policies LABEL DESCRIPTION Certificate Select the Certificate radio button to identify the ZyXEL Device by a certificate. Use the drop-down list box to select the certificate to use for this VPN tunnel. You must have certificates already configured in the My Certificates screen. Click My Certificates to go to the My Certificates screen where you can view the ZyXEL Device's list of certificates. Encryption Algorithm Select DES, 3DES, AES or NULL from the drop-down list box. When you use one of these encryption algorithms for data communications, both the sending device and the receiving device must use the same secret key, which can be used to encrypt and decrypt the message or to generate and verify a message authentication code. The DES encryption algorithm uses a 56-bit key. Triple DES (3DES) is a variation on DES that uses a 168-bit key. As a result, 3DES is more secure than DES. It also requires more processing power, resulting in increased latency and decreased throughput. This implementation of AES uses a 128-bit key. AES is faster than 3DES. Select NULL to set up a tunnel without encryption. When you select NULL, you do not enter an encryption key. Authentication Algorithm Select SHA1 or MD5 from the drop-down list box. MD5 (Message Digest 5) and SHA1 (Secure Hash Algorithm) are hash algorithms used to authenticate packet data. The SHA1 algorithm is generally considered stronger than MD5, but is slower. Select MD5 for minimal security and SHA-1 for maximum security. Advanced Click Advanced to configure more detailed settings of your IKE key management. Back Click Back to return to the previous screen. Apply Click Apply to save your changes back to the ZyXEL Device. Cancel Click Cancel to begin configuring this screen afresh. 16.12 IKE Phases There are two phases to every IKE (Internet Key Exchange) negotiation - phase 1 (Authentication) and phase 2 (Key Exchange). A phase 1 exchange establishes an IKE SA and the second one uses that SA to negotiate SAs for IPSec. Figure 133 Two Phases to Set Up the IPSec SA In phase 1 you must: P-662H/HW-D Series User's Guide 233