Simple Balance 20 Config


#1

Looking for some rudimentary configuration assistance.
I do not want to kill my customer’s network and have never used one of these devices. We have two ISPs with static public IPs. there is no “drop in” config option for this box. The customer has an existing Sonicwall firewall having a public IP WAN and private IP LAN gateway handed out via DHCP on the local data subnet. Can we insert the Peplink between the two ISPs router connections with a private IP connection on the WAN and have a private IP address on the LAN interface to the firewall? Would the firewall then need to make a change of the WAN IP address to be a static private on the existing data subnet? We are trying to create a back up of both the data (internet) connection, as well as the SIP voice service with registration. We do have a visio diagram of the setup.


#2

Yes you can have private IPs on both the WAN(s) and LAN of the B20 but you will want them to be in unique subnets so that the balance knows what to route where. Share a sketch of the topology for a more detailed response.


#3

Hello,
Thank you for your reply. The Balance 20 will have two public IPs from the two ISPs and the Balance 20 LAN will connect to the existing Sonicwal Firewall. My question is can the Balance 20 LAN have a private IP on the same subnet as the WAN of the Sonicwall? I am concerned about double NATing as we intend to also use this as a failover for SIP voice traffic from one ISP to the other. Diagram attached.



#4

Can the Balance 20 LAN have a private IP on the same subnet as the WAN of the Sonicwall? Ans: Yes.
I am concerned about double NATing as we intend to also use this as a failover for SIP voice traffic from one ISP to the other. Ans: Double-NAT isn’t an issue, but I’m not sure how your voice is been routed here.

Unless your firewall is running on transparent mode, its LAN and WAN should be of different subnet.
Where is your static routes been configured? I assume it’s the blue switch?