Cisco VPN 3000 User's Guide download pdf (Page 177)

100

101

Configuration | System | Management Protocols | SSL

9-13

VPN 3000 Concentrator Series User Guide

TLS V1 with SSL V2 Hello = The server insists on TLS Version 1 but accepts an initial SSL Version 2

“Hello.” At present, only Microsoft Internet Explorer 5.0 supports this option.

Generated Certificate Key Size

Click the drop-down menu button and select the size of the RSA key that the VPN Concentrator uses in

its self-signed (generated) SSL server certificate. A larger key size increases security, but it also

increases the processing necessary in all transactions over SSL. The increases vary depending on the

type of transaction (encryption or decryption).

Choices are:

512-bit RSA Key = This key size provides sufficient security. It is the most common, and requires the

least processing.

768-bit RSA Key = This key size provides normal security and is the default selection. It requires

approximately 2 to 4 times more processing than the 512-bit key.

1024-bit RSA Key = This key size provides high security. It requires approximately 4 to 8 times more

processing than the 512-bit key.

Apply / Cancel

To apply your SSL settings, and to include your settings in the active configuration, click Apply. The

Manager returns to the

Configuration | System | Management Protocols screen.

Reminder: To save the active configuration and make it the boot configuration, click the

Save Needed icon at the

top of the Manager window.

To discard your settings, click

Cancel. The Manager returns to the Configuration | System | Management

Protocols

screen.

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