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Figure 159 AFT process for IPv4-imitated communication
AFT with ALG
AFT with ALG translates address or port information in the application layer payloads to ensure
connection establishment.
For example, an FTP application includes a data connection and a control connection. The IP
address and port number for the data connection depends on the payload information of the control
connection. This requires AFT with ALG to translate the address and port information for data
connection establishment.
AFT with ALG supports the following protocol packets: FTP packets, DNS packets, and ICMP error
messages.
AFT configuration task list
For IPv6-initiated communication
Task at a glance
(Required.) Enabling AFT
(Required.) Configuring an IPv6-to-IPv4 destination address translation policy
(Required.) Configuring an IPv6-to-IPv4 source address translation policy
(Optional.) Configuring AFT logging
(Optional.) Setting the ToS field to 0 for translated IPv4 packets
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