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IPSec ALG: It is an encryption technology. Select it to enable IPSec ALG,
the default is enable.
FTP ALG: FTP is a service of connection layer which can transform intranet
IP into extranet IP when intranet IP is sending out packet. Select it to
enable FTP ALG, the default is enabling.
PPTP ALG: Select it enable PPTP ALG, the default is enable.
Shows the NAT UDP mapping table. NAT Table Option:
The setting page as below:
Shows the NAT TCP mapping table
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