53
Web User Interface
(PFS)
setup, but is not so secure. Select DH1, DH2 or DH5 to
enable PFS.
Phase 2 DH group
After enable PFS, you need to choose DHx.
Replay detection
As a VPN setup is processing intensive, the system is
vulnerable to Denial of Service (DOS) attacks. The IPSec
receiver can detect and reject old or duplicate packets to
protect against replay attacks. Enable replay detection by
selecting this check box.
NetBIOS broadcast
forwarding
NetBIOS (Network Basic Input/Output System) are TCP or
UDP packets that enable a computer to find other
computers. It may sometimes be necessary to allow
NetBIOS packets to pass through VPN tunnels in order to
allow local computers to find computers on the remote
network and vice versa. Select this check box to send
NetBIOS packets through the VPN connection.
Dead peer detection
Force wireless router to detect if the remote IPSec gateway
is available or not periodically.
Manual Encryption Key
If choose Manual in Key Management field, you need to
input a Manual encryption key for encryption, 16
hexadecimal digits
Manual Authentication
Key
Type a unique authentication key to be used by IPSec, 32
hexadecimal digits
Inbound SPI
Type a unique SPI (Security Parameter Index)
Outbound SPI
Type a unique SPI (Security Parameter Index)
6.4.4 VPN - L2TP / PPTP
Layer 2 Tunneling Protocol (L2TP) is a tunneling protocol used to support virtual private
networks (VPNs).
PPTP (Point-to-Point Tunneling Protocol) is a Microsoft proprietary protocol (RFC 2637 for
PPTP is informational only) to tunnel PPP frames, which is very similar to L2TP.
U10C019/U10C020
