Bedienungsanleitung Linksys wrv54g router (Seite 43 von 145) (Englisch)

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Chapter 6: Configuring the Wireless-G VPN Broadband Router

The Security Tab - VPN

Wireless-G VPN Broadband Router

Encryption. Using encryption also helps make your connection more secure. There are two different types of

encryption: DES or 3DES (3DES is recommended because it is more secure). You may choose either of these, but

it must be the same type of encryption that is being used by the VPN device at the other end of the tunnel. Or, you

may choose to disable this feature.

Authentication. Authentication acts as another level of security. There are two types of authentication: MD5 and

SHA (SHA is recommended because it is more secure). As with encryption, either of these may be selected,

provided that the VPN device at the other end of the tunnel is using the same type of authentication. Or, both ends

of the tunnel may choose to disable authentication.

Key Management

Key Exchange Method. Select Auto (IKE) or Manual for the Key Exchange Method. Both ends of a VPN tunnel

must use the same mode of key management. The two methods are described below. After you have selected the

method, the settings available on this screen may change, depending on the selection you have made.

Auto (IKE)

IKE is an Internet Key Exchange protocol used to negotiate key material for Security Association (SA). IKE uses

the Pre-shared Key to authenticate the remote IDE peer.

PFS. PFS (Perfect Forward Secrecy) ensures that the initial key exchange and IKE proposals are secure. To

use PFS, click the Enabled radio button.

Pre-shared Key. You can choose to use a Pre-shared Key or RSA Signature. To use the Pre-shared Key, click

its radio button. enter a series of numbers or letters in the Pre-shared Key field. Based on this word, which

MUST be entered at both ends of the tunnel, a key is generated to scramble (encrypt) the data being

transmitted over the tunnel, where it is unscrambled (decrypted). You may use any combination of up to 24

numbers or letters in this field. No special characters or spaces are allowed.

RSA Signature. You can choose to use a Pre-shared Key or RSA Signature. To use the RSA Signature, click its

radio button. Enter the RSA Signature in the field provided. (This is similar to a Pre-shared Key. Make sure it

matches the RSA Signature entered at the remote end of the tunnel.s

Key Lifetime. You may optionally select to have the key expire at the end of a time period of your choosing.

Enter the number of seconds you’d like the key to be useful, or leave it blank for the key to last indefinitely.

Manual

If you select Manual, you generate the key yourself, and no key negotiation is needed. Basically, manual key

management is used in small static environments or for troubleshooting purposes.

Figure 6-27: Remote Secure Group - Any

and Remote Secure Gateway - FQDN

Figure 6-28: Remote Security Group - Any

and Remote Secure Gateway - Any

Figure 6-29: Key Exchange Method - Auto(IKE)

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