RUT301 - Communication between LAN and WAN devices on different subnets

Networking Solutions Question
1

Hello,

I have a Teltonika RUT301 router and I am trying to enable communication between a PLC connected to the WAN interface and another PLC connected to the LAN interface.

Network topology:

WAN side:

  • PLC: 192.168.1.100

  • Subnet mask: 255.255.255.0

  • Gateway: 192.168.1.1 (RUT301)

LAN side:

  • PLC: 192.168.10.11

  • Subnet mask: 255.255.255.0

  • Gateway: 192.168.10.1 (RUT301)

RUT301:

  • WAN: 192.168.1.1/24

  • LAN: 192.168.10.1/24

Objective:
The PLC on the LAN side (192.168.10.11) needs to communicate with the PLC on the WAN side (192.168.1.100) for industrial data read/write operations.

Questions:

  1. Does the RUT301 allow routing between LAN and WAN by default?

  2. Are additional static routes required for the 192.168.10.0/24 and 192.168.1.0/24 networks?

  3. Could WAN masquerading/NAT be preventing this communication?

  4. Do I need to create specific Traffic Rules or Zone Forwarding rules between LAN and WAN?

  5. Is there a recommended Teltonika configuration for direct communication between devices connected to different router interfaces?

Both PLCs are already configured with the RUT301 as their default gateway, so in theory the router should be able to route traffic between the two networks.

Any guidance on the correct configuration would be greatly appreciated.

I´m not one expert.

Thank you.