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IP profile parameters.......................................... 3-21
IP Parameters (WAN Default Profile) .................... 3-23
NAT Associations......................................................... 3-25
IP Passthrough ............................................................ 3-27
MultiNAT Configuration Example.................................... 3-31
Chapter 4 — Virtual Private Networks (VPNs)............................4-1
Overview....................................................................... 4-1
About PPTP Tunnels ....................................................... 4-4
PPTP configuration ............................................... 4-4
About IPsec Tunnels....................................................... 4-7
About ATMP Tunnels....................................................... 4-8
ATMP configuration .............................................. 4-8
Encryption Support...................................................... 4-10
MS-CHAP V2 and 128-bit strong encryption ......... 4-11
ATMP/PPTP Default Profile............................................ 4-11
VPN QuickView ............................................................ 4-13
Dial-Up Networking for VPN........................................... 4-14
Installing Dial-Up Networking............................... 4-14
Creating a new Dial-Up Networking profile............ 4-15
Configuring a Dial-Up Networking profile............... 4-16
Installing the VPN Client............................................... 4-17
Windows 95 VPN installation .............................. 4-17
Windows 98 VPN installation .............................. 4-18
Connecting using Dial-Up Networking................... 4-19
Allowing VPNs through a Firewall................................... 4-19
PPTP example.................................................... 4-20
ATMP example................................................... 4-22
Windows Networking Broadcasts................................... 4-25
Chapter 5 — Internet Key Exchange (IKE) IPsec
Key Management for VPNs ...................................5-1
Overview....................................................................... 5-1
Internet Key Exchange (IKE) Configuration........................ 5-2