D-Link DWM-312W User Manual page 58

Section 4 - Configuration
Access policies and NAT
Toggle these settings to Allow or Deny to allow clients using the VPN to
send or receive data using the interface in question.
Advanced settings
Maximum number Specify the maximum number of connections.
of connections
MTU Specify the Maximum Transmission Unit of the
connection. The default setting is 1400.
Enable debug Toggle this switch to enable debug mode.
mode
D-Link DWM-312W User Manual 54