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Using the Configuration Interface
31 D-Link Systems, Inc.
Special Applications
The Special Application section is used to open single or multiple ports on your router when the
router senses data sent to the Internet on a ‘trigger’ port or port range. Special Applications rules
apply to all computers on your internal network.
Application Level Gateway (ALG) Configurations
Here you can enable or disable ALG’s. Some protocols and applications require special handling
of the IP payload to make them work with network address translation (NAT). Each ALG provides
special handling for a specific protocol or application. A number of ALGs for common applications
are enabled by default.
Allows multiple machines on the LAN to connect to their corporate network
using PPTP protocol.
Allows multiple VPN clients to connect to their corporate network using
IPSec.
Some VPN clients support traversal of IPSec through NAT.
This ALG may
interfere with the operation of such VPN clients. If you are
having trouble connecting with your corporate network, try turning this ALG
off. Please check with the system adminstrator of your corporate network
whether your VPN client supports NAT traversal.
Allows applications that use Real Time Streaming Protocol to receive
streaming media from the internet. QuickTime and Real Player are some
of the common applications using this protocol.
Allows FTP clients and servers to transfer data across NAT. Refer to the
Advanced -> Virtual Server page if you want to host an FTP server.
Allows Microsoft NetMeeting clients to communicate across NAT. Note
that if you want your buddies to call you, you should also set up a virtual
server for NetMeeting. Refer to the Advanced -> Virtual Server page for
information on how to set up a virtual server.
Allows devices and applications using VoIP (Voice over IP) to communicate
across NAT. Some VoIP applications and devices have the ability to
discover NAT devices and work around them. This ALG may interfere with
the operation of such devices. If you are having trouble making VoIP calls,
try turning this ALG off.
Allows Windows Media Player, using MMS protocol, to receive streaming
media from the internet.
Allows multiple machines on the LAN to connect to their corporate network
using the L2TP protocol.
Allows all of the Windows Messenger functions to work properly through
the router.
PPTP:
IPSec VPN:
RTSP:
FTP:
NetMeeting:
SIP:
MMS:
L2TP:
Windows Messenger:
Advanced > Special Applications