For anyone trying to get VPN working using Nortels Contivity VPN Client through the first generation Sky Netgear router here is a step by step walkthrough:
1 Get IP Address from PC Details – write it down.
2 Login to Router :
http://192.168.0.1
3 Username : admin
4 Password : Sky
5 Goto Maintenance Menu Item -> View Attached Devices
6 Note MAC Address & Name for IP address from Step 1
7 Goto Advanced Menu Item -> Lan IP Setup
8 Click Add
9 In the IP Address put in IP from Step 1
10 Put in Mac and name
11 Click Add
12 Goto Firewall Rules
13 Click Add on Inbound Services
14 Pull the Drop down for Services, highlight VPN-IPSEC
15 Change Action to : ALLOW Always
16 Change Send to Lan Server : IP Address from Step 1
17 Change Wan Users : Any
18 Change Log : Always
19 Click Apply
20 Reboot Laptop