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What's new for V5R4

Describes what information is new or significantly changed in this release.

New Function: Traffic Flow Confidentiality (TFC)

Traffic Flow Confidentiality (TFC) allows you to conceal the actual length of the data packets transferred over the VPN connection. Use TFC for extra security against attackers who might guess the type of data being sent over the VPN connection from the length of the data packet. You can only use TFC if your data policy is setup for Tunnel Mode.

New Function: Extended Sequence Number (ESN)

Extended Sequence Number (ESN) allows your VPN connection to transmit large volumes of data at a high speed with out having to frequently re-key. You can only enable ESN when your data policy uses the Authentication Header (AH) protocol or the Encapsulation Security Payload (ESP) protocol and AES as the encryption algorithm.

New Scenario: Firewall Friendly VPN

In this scenario you can learn how to establish a VPN connection where the gateway (client) and the host (server) are behind a firewall running Network Address Translation (NAT).

How to see what's new or changed

To help you see where technical changes have been made, this information uses:
  • The Start of change image to mark where new or changed information begins.
  • The End of change image to mark where new or changed information ends.

To find other information about what's new or changed this release, see the Memo to Users.

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