I’m trying to access devices connected to the LAN of my Comcast Router from devices connected to the LAN of the Peplink Balance 210. The Comcast Router provides my internet connection to WAN 1 of the Peplink Balance 210. The connection from the Comcast Router to the Peplink balance is LAN Port 1 on the Comcast Router to WAN 1 on the Peplink Balance 210. See diagram.
I’ve thought of trying NAT and static routes with an outbound policy, but I wasn’t able to get it to work.
Any suggestions, I feel this should be easy, but I’m not sure.
Comcast LAN1 & LAN2 having the same network IP ? I have similar setup and it work.
Do you able to perform packet capture from B210 and verify whether the traffics is sent ?
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First question – is it possible to move the server behind the peplink? Then it is all local traffic and you wouldn’t need to manage multiple networks. The laptop would absolutely be able to communicate with the server then.
Second question - Is WAN1 of the peplink assigned an address inside the 10.1.10.x network (same subnet as the “Server”)? if so, the routing should all be taken care of and you should be able to get from the laptop to the server – it is only one hop away and the network is in the WAN routing table since WAN1 is a member of that network. I imagine that the issue with this setup is that the comcast router does not know how to get traffic to the 192.168.1.x network. You could try to add a static LAN route on the comcast router if it supports it. Basically, the route would be “to get to 192.168.1.0/24 go through 10.1.10.18” (assuming peplink WAN1 is that address). My experience with comcast routers leads me to believe it won’t have an option to add a LAN based route (or any kind of static route most likely) 
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First you have to show the laptop how to find the server’s network. That would be an outbound rule in the Peplink. Destination 10.1.10.17 enforced to WAN1.
Next you have to tell the server how to reply. That would be a static route in the Comcast router. First thing is that the Peplink’s address on the Comcast LAN must be fixed, either static configuration or a reservation in the Comcast. For illustration lets say the Peplink’s WAN1 is 10.1.10.50.
At this point the Comcast router still doesn’t know where to send traffic back to the laptop. Build a static route for destination 192.168.1.17 can be reached via 10.1.10.50. Or use the Peplink’s entire LAN such as 192.168.1.0/24 if you wish other devices to have server access.
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