DVG-5121SP User’s Manual
D-Link Corporation
31
IPSec Pass Through:
IPsec is a framework for a set of protocols for security at the network or packet processing
layer of network communication. Enable or Disable this framework verification.
PPTP Pass Through:
PPTP is a protocol that allows corporations to extend their own corporate network through
private tunnels over the public Internet. Enable or Disable this protocol verification.
L2TP Pass Through:
L2TP is an extension to PPP, which is an important component for VPNs. VPNs allow users
and telecommuters to connect to their corporate intranets or extranets. Enable or Disable this
function.
SIP ALG:
SIP ALG (Application Layer Gateway) is a signaling protocol for Internet conferencing, telephony,
presence, events notification and instant messaging. Enable or Disable this protocol verification.
NetMeeting ALG:
NetMeeting
ALG (Application Layer Gateway) is used to configure the different accessibility
options of your system. It enables an authorized user to access this computer remotely by using
NetMeeting over a corporate intranet. Enable or Disable this protocol verification.
DMZ:
If you have multiple PCs, you can choose one of the computers to be between the Internet connection and the
firewall. This exposes that computer to the Internet without security and should only be enabled if absolutely
necessary. Enable or Disable this function.