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NAT-DMZ
NAT-Passthrough
VPN:
VPN: Some applications require an application level gateway throught the router.
FTP:
FTP: If the FTP server is using a non-standard FTP port number,this can prevent FTP data
connections from being established.
NetMeeting:
NetMeeting: To accept the connection request from any outside NetMeeting client, the virtual
server for H.323/Netmeeting(Port:1720) must be enabled.
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