Netgear DG834G User Manual Page 113

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Reference Manual for the ADSL Modem Wireless Router DG834G
Virtual Private Networking 8-5
v1.2, October 2006
Will either endpoint use Fully Qualified Domain Names (FQDNs)? FQDNs supplied by
Dynamic DNS providers (see “The Use of a Fully Qualified Domain Name (FQDN)” on
page B-8) can allow a VPN endpoint with a dynamic IP address to initiate or respond to a
tunnel request. Otherwise, the side using a dynamic IP address must always be the initiator.
What method will you use to configure your VPN tunnels?
The VPN Wizard using VPNC defaults (see Table 8-2)
The typical automated Internet Key Exchange (IKE) setup (see “Using Auto Policy to
Configure VPN Tunnels” on page 8-38)
A Manual Keying setup in which you must specify each phase of the connection (see
“Using Manual Policy to Configure VPN Tunnels” on page 8-49)?
What level of IPSec VPN encryption will you use?
DES - The Data Encryption Standard (DES) processes input data that is 64 bits wide,
encrypting these values using a 56 bit key. Faster but less secure than 3DES.
3DES - (Triple DES) achieves a higher level of security by encrypting the data three times
using DES with three different, unrelated keys.
What level of authentication will you use?
MDS: 128 bits, faster but less secure.
SHA-1: 160 bits, slower but more secure.
Table 8-2. Parameters Recommended by the VPNC and Used in the VPN Wizard
Parameter Factory Default
Secure Association Main Mode
Authentication Method Pre-shared Key
Encryption Method 3DES
Authentication Protocol SHA-1
Diffie-Hellman (DH) Group Group 2 (1024 bit)
Key Life 8 hours
IKE Life Time 1 hour
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