PPTP(point-to-point tunneling protocol)
◦Microsoft protocol
◦Supported by most Microsoft OS
◦Supports only TCP/IP
◦TCP port 1723
L2TP(Layer 2 Tunneling Protocol)
◦Open standard
◦Support multiple protocols not just TCP/IP
◦Can use IP sec for encryption (Requires certificates)
◦Is not supported by older operating systems
◦ TCP port 1701, UDP port 500
◦IPv6 support
SSTP(Secure Socket Tunneling Protocol)
◦Uses SSL for encryption
◦Port 443
◦Better firewall support (port may already be open
◦Support certificates
◦Client access only, not site to site
◦Limited support for older clients
Windows vista SP1
Support windows xp with SP3
