Drop-in Mode allows Peplink Balance to be deployed in a network without incurring any configuration changes to existing network devices.
In the following network diagram, ISP A provides a 24-bit network 126.96.36.199 / 255.255.255.0, 188.8.131.52 is the default gateway. The Firewall is performing NAT (Network Address Translation) for Local Area Network 192.168.1.0 to access the Internet.
External Interface IP: 184.108.40.206/24
Default Gateway: 220.127.116.11
Internal Interface IP: 192.168.1.1/24
The Peplink Balance is now installed. The DSL and Cable connections will be the second and third Internet connections.
When operating, Peplink Balance forwards the traffic between LAN and WAN1 of the Balance unit without performing any IP address translation. The Firewall will not notice any change in the IP addresses of the hosts on WAN1, and vice-versa. Because the Firewall is remaining same configuration, firewall default gateway will still be ISP gateway 18.104.22.168. (Do NOT change the Firewall Default Gateway to Peplink’s IP 22.214.171.124)
For the other WAN connections, they will be operating in NAT mode by default, which allows proper routing of traffic coming back and forth via different ISP.
1) PPTP server will be disabled automatically if the Balance is deployed in Drop-in mode.
2) Drop-in mode can be configured on any WAN port. But there is only one WAN port can be configured in Drop-in mode.
3) High Availability will be disabled automatically if the LAN Bypass port is selected as the WAN port for Drop-in mode.