Configuration Examples .................................................................................... 34
Contents (Cont.)
Part 1: Basic Internet Access................................................................................................ 34
Internet Access using a Logical Interface ..................................................................................... 34
Basic Internet Access using LAN2................................................................................................ 36
Part 2: VPN configuration ..................................................................................................... 37
IPSec - Between Two IP Office systems over ADSL using the Logical LAN ................................ 37
L2TP/IPSec between two IP Office’s ............................................................................................ 40
Part 1 - L2TP configuration .......................................................................................................................41
Part 2 - IPSec configuration ......................................................................................................................43
IPSec Client Application (Dynamic Mode) .................................................................................... 45
Part 1 - VPN Client Configuration..............................................................................................................46
Part 2 - IP Office Configuration ................................................................................................................47
IPSec over the WAN..................................................................................................................... 49
A Numbered PPP WAN Link .....................................................................................................................49
An Un-numbered PPP WAN Link..............................................................................................................51
Part 3 VoIP Configuration ..................................................................................................... 53
Glossary .............................................................................................................. 56
Figures
Figure 1.
A Virtual Private Network ........................................................................................... 4
Figure 2.
An IPSec Framework ................................................................................................. 6
Figure 3.
LT2P Tunneling Modes .............................................................................................. 7
Figure 4.
Inbound Unprotected Packet...................................................................................... 9
Figure 5.
Inbound Unprotected Packet Type Detection........................................................... 10
Figure 6.
L2TP Implementation ............................................................................................... 12
Figure 7.
Logical LAN Implementation .................................................................................... 13
Figure 8.
IP Office VPN Networking ........................................................................................ 15
Figure 9.
The IP Security Menu............................................................................................... 24
Figure 10.
IP Phase 1 and Phase 2 negotiations .................................................................... 27
Figure 11.
The IKE Policies tab ............................................................................................... 28
Figure 12.
The IPSec Policies tab ........................................................................................... 29
Figure 13.
The L2TP/Tunnel Menu.......................................................................................... 30
Figure 14.
The L2TP/L2TP tab ................................................................................................ 31
Figure 15.
The L2TP/PPP tab ................................................................................................. 32
Figure 16.
The Logical LAN Menu........................................................................................... 33
Figure 17.
Internet Access Via the Logical LAN ...................................................................... 34
Figure 18.
Internet Access Via LAN2....................................................................................... 36
Figure 19.
IP Office to IP Office via Logical LAN ..................................................................... 37
Figure 20.
L2TP/IPSec - IP Office to IP Office......................................................................... 40
Figure 21.
PC running IPSec Client Application ...................................................................... 45
Figure 22.
A Numbered PPP WAN Link .................................................................................. 49
Figure 23.
An Un-numbered PPP WAN Link ........................................................................... 51
