D-Link DIR-665 Product Manual - Page 43

Application Level Gateway ALG Configuration - pptp

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Section 3 - Configuration Application Level Gateway (ALG) Configuration 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. PPTP: Allows multiple machines on the LAN to connect to their corporate network using PPTP protocol. IPSEC (VPN): 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. RTSP: 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. SIP: 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. D-Link DIR-665 User Manual 39

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D-L±nk DIR-665 User Manual
Sect±on ´ - Configurat±on
Application Level Gateway (ALG) Configuration
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 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.
PPTP:
IPSEC (VPN):
RTSP:
SIP: