Zoom 4420-A - Manual (Page 41)

Chapter 5. TCP/IP Settings 41
troubleshooting – it can allow a technician to
remotely check the AP+4 configuration
settings.
In normal use, this option should be disabled
for security reasons.
Enable IPsec
passthrough on
VPN connection (PPTP/VPN only) Select this check box to let
network devices communicate via a Virtual
P
rivate Network (VPN) using Internet Protocol
sec urity (IPsec), in which sending and
receiving devices share a so-called public key
for encryption and decryption. The AP+4
simply passes the encrypted packets back and
forth between the VPN clients and the ISP’s
VPN server.
Enable PPTP
passthrough on
VPN connection (PPTP/VPN only) Select this check box to
protect VPN communication via Point-to-Point
T
unneling Protocol. The AP+4 passes the
encrypted packets back and forth between the
VPN clients and the ISP’s VPN server.
Enable L2TP
passthrough on
VPN connection (PPTP/VPN only) Select this check box to
protect VPN communication via Layer 2
T
unneling Protocol, an enhancement of PPTP
and L2F protocols. The AP+4 passes the
encrypted packets back and forth between the
VPN clients and the ISP’s VPN server.