Cisco Systems OL-5532-02 Manual de usuario descargar pdf (Pagina 22)

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Cisco IP Solution Center Integrated VPN Management Suite Security User Guide, 3.2

OL-5532-02

Chapter 4 Remote Access VPN Services

Creating Remote Access VPN Policies

Figure 4-21 The Remote Access VPN Policy – VPN 3000 L2TP Page

Step 2

Follow the instructions in Table 4-10 to select options for VPN 3000 L2TP tunneling.

Table 4-10 Remote Access VPN Policy – VPN 3000 L2TP Editor Fields

Field Name Type Instructions

Use Client Address checkbox Check the box if you want to accept and use an IP address received from the client.

L2TP Compression checkbox Check the box if you want to enable compression for L2TP connections for this

group.

Required checkbox Check the box if you want to require encryption.

Require Stateless checkbox When enabled, during connection setup the L2TP clients must agree to use stateless

encryption to encrypt data or they will not be connected. With stateless encryption,

the encryption keys are changed on every packet. Otherwise, the keys are changed

after some number of packets or whenever a packet is lost. Stateless encryption is

more secure, but it requires more processing. However, its performance can improve

in a lossy environment (where packets are lost), such as the Internet.

This option is unchecked (disabled) by default. Do not check this option if you use

the NT Domain option for user authentication. The NT Domain authentication

cannot negotiate encryption.

Check the box if you want to enable stateless encryption.

40-Bit checkbox Check the box if you want to use 40-bit encryption.

128-Bit checkbox Check the box if you want to use 128-bit encryption.

PAP checkbox Check the box to use Password Authentication Protocol (PAP), or uncheck the box to

disable use of this protocol.

CHAP checkbox Check the box to use Challenge-Handshake Authentication Protocol (CHAP), or

uncheck the box to disable use of this protocol.

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Cisco Systems OL-5532-02 Manual de usuario Pagina 22