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How To
Industrial Automation & Networking
Prepared by: Matt Crites
Date: March 28, 2014
Product: SN/RAM
Software: Web Browser, preferably Chrome or Firefox.
Firmware: Legacy firmware 3.14/4.14
Subject:
Setup of a simple GRE tunnel between two SN/RAM devices.
Setup GRE Tunneling on RAM
Abstract:
This document provides a step by step procedure for setting a GRE tunnel between two RAM devices. GRE provides no
encryption. It simply a tunneling protocol
Procedure:
Part 1 – Setting up GRE on the “Client”
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Log into the SN/RAM Web Browser
o Type the device’s LAN/WAN IP, port 10000 into a web browser
o User Name: admin; Password: Last six digits of the device’s serial number
Go to Networking – Tunneling(VPN) Settings – GRE Tunneling
Click Add
Set the following:
o Enable Tunnel?
Yes
o Local GRE Endpoint IP/Mask:
192.168.2.6/30
o Remote Public IP:
Enter the cellular IP of other RAM
o Remote GRE Endpoint IP/Mask
192.168.2.5/30
o Leave the rest of the fields at default
o Click OK
Apply Settings
Part 2 –Setting Static Route on “Client”:
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Go to Networking → Static Route.
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Click Add
Enter the following settings:
o Interface:
gre1
o Use as “Any” route?
No
o Select Route Type:
Choose Host to Network
o Enter Target IP Address:
Enter the host IP address here
 Note: if Route type is “Network” you’ll need to enter the network on the opposite side of tunnel
o Enter Gateway:
192.168.2.5
o Click OK
Click Apply
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Part 3 –Setting up GRE Tunnel on “Server”:
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Log into the SN/RAM Web Browser
o Type the device’s LAN/WAN IP, port 10000 into a web browser
o User Name: admin; Password: Last six digits of the device’s serial number
Go to Networking – Tunneling(VPN) Settings – GRE Tunneling
Click Add
Set the following:
o Enable Tunnel?
Yes
o Local GRE Endpoint IP/Mask:
192.168.2.5/30
o Remote Public IP:
Enter the cellular IP of other RAM
o Remote GRE Endpoint IP/Mask
192.168.2.6/30
o Leave the rest of the fields at default
o Click OK
Apply Settings
Part 4: Setting up Static Route on “Server”:

Go to Networking → Static Route.


Click Add
Enter the following settings:
o Interface:
gre1
o Use as “Any” route?
No
o Select Route Type:
Choose Host to Network
o Enter Target IP Address:
Enter the host IP address here
 Note: if Route type is “Network” you’ll need to enter the network on the opposite side of tunnel
o Enter Gateway:
192.168.2.6
o Click OK
Click Apply
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Part 5: Test
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Go to Status --> Diagnostic Tools --> Ping
Enter the following:
o Enter Host/IP Address to test:
o Source Interface:
Click Ping
Pings should come back successful
Enter the IP of the host on other side of GRE tunnel
gre1 (can also choose the GRE endpoint 192.168.2.x)