Netgear SRX5308 User Manual download pdf (Page 232)

Virtual Private Networking Using IPSec and L2TP Connections

232

ProSafe Gigabit Quad WAN SSL VPN Firewall SRX5308

endpoints (the local ID endpoint and the remote ID endpoint). You still need to manually

enter all settings on the remote VPN endpoint (unless the remote VPN endpoint also has

a VPN Wizard).

In addition, a certification authority (CA) can also be used to perform authentication (see

Manage Digital Certificates for VPN Connections on p

age 313). For gateways to use a CA to

perform authentication, each VPN gateway needs t

o have a certificate from the CA. For each

certificate, there is both a public key and a private key. The public key is freely distributed,

and is used by any sender to encrypt data intended for the receiver (the key owner). The

receiver then uses its private key to decrypt the data (without the private key, decryption is

impossible). The use of certificates for authentication reduces the amount of data entry that is

required on each VPN endpoint.

VPN Policies Screen

The VPN Policies screen allows you to add additional policies—either Auto or Manual—and

to manage the VPN policies already created. You can edit policies, enable or disable policies,

or delete them entirely. These are the rules for VPN policy use:

• T

raffic covered by a policy is automatically sent through a VPN tunnel.

• When

traffic is covered by two or more policies, the first matching policy is used. (In this

situation, the order of the policies is important. However, if you have only one policy for

each remote VPN endpoint, then the policy order is not important.)

• The VPN tun

nel is created according to the settings in the security association (SA).

• The re

mote VPN endpoint needs to have a matching SA; otherwise, it refuses the

connection.

To access the VPN Policies screen, select VP

N > IPSec VPN > VPN Policies. In the upper

right of the screen, the IPv4 radio button is selected by default. The VPN Policies screen

displays the IPv4 settings. (The following figure shows some examples.) To display the IPv6

settings on the IKE Policies screen, select the IPv6 radio button.

Figure 156.

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Netgear SRX5308 User Manual Page 232