Supported VPN protocols

ZoneAlarm security software monitors the VPN protocols listed in the table below.

Supported VPN protocols

Networking Protocol	Explanation and Comments
AH	Authentication Header Protocol
ESP	Encapsulating Security Payload protocol
GRE	Generic Routing Encapsulation protocol
IKE	Internet Key Exchange protocol
IPSec	IP Security protocol.
L2TP	Layer 2 Tunneling protocol. L2TP is a more secure variation of PPTP.
LDAP	Lightweight Directory Access protocol
PPTP	Point-to-Point Tunneling protocol
SKIP	Simple Key Management for Internet Protocol