Billion BiPAC 7800(N)X(L) User Manual page 204

Examples (7800NX for example):
1. LAN-to-LAN connection
Two BiPAC 7800NXs want to setup a secure IPSec VPN tunnel
Note: The IPSec Settings shall be consistent between the two routers.
Head Office Side:
Setup details:
Item
Connection Name
1
Local Network
Subnet
2
IP Address
Netmask
Secure
3
Address(Hostanme)
Remote Network
Subnet
4
IP Address
Netmask
Proposal
Method
Authentication
5
Encryption
Prefer
Security
Pre-shared Key
Function
H-to-B
192.168.1.0
255.255.255.0
Gateway
69.121.1.30
192.168.0.0
255.255.255.0
ESP
MD5
3DES
Forward
MODP 1024(group2)
123456
Description
Give a name for IPSec connection
Select Subnet
Head Office network
IP address of the Branch office router
(on WAN side)
Select Subnet
Branch office network
Security Plan
199