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D-Link M30 AX3000 Dual-Band Wi-Fi 6 Router User Manual
Section 3 - Configuration
PPTP:
Allows multiple machines on the LAN to connect to their corporate network
using the 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
Application Level Gateway (ALG) may interfere with the operation of such
VPN clients. If you are having trouble connecting to your corporate network,
try to turn off this ALG. Please check with the system administrator of your
corporate network for whether your VPN client supports NAT traversal.
RTSP:
Allows applications that uses Real Time Streaming Protocol (RTSP) to receive
media streaming from the Internet.
SIP:
Allows devices and applications using Voice over IP (VoIP) 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
to turn off this ALG.
Firewall
Application Level Gateway (ALG) Configuration
Different ALGs provide special handling for specific protocols or applications.
A number of ALGs for common applications are enabled by default as stated
below.
Advanced Settings...
