- 51 -
resources by building a DMZ region which can provide the network level protection for the
equipments environment, reduce the risk which is caused by providing service to distrust customer,
and is the best position to put public information
The following chart describes the network access control of DMZ
NAT Configuration
Field name
explanation
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 enable
PPTP ALG
Select it enable PPTP ALG, the default is enable