Yamaha DRCX User Manual page 48

CHAPTER2 Ethernet Unit
Internet Internet Internet
■ Example 5
In this example, a controller in a remote location is centrally managed over the Internet.
Internet
Head office
Router Router
HUB HUB
PC PC
Use of a firewall (defense mechanism to keep out intruders) is recommended to maintain
security.
System setup example
Head office router
PC
Factory 1 router
Controller 1
Factory 2 router
Controller 1
* Routers must be set to match system conditions.
* To make a connection over the Internet, a global address must be set in the IP address.
* Use of identical addresses is not allowed so customers must not use the addresses set in the
above example.
Always use the customer's own unique address. NIC (in Japan, JPNIC) handles the
assigning and management of addresses.
IP address Subnet mask
133.215.0.1 255.255.255.0
133.215.0.2 255.255.255.0
133.215.1.1 255.255.255.0
133.215.1.2 255.255.255.0
133.215.2.1 255.255.255.0
133.215.2.2 255.255.255.0
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Factory 2 Factory 2
Factory 1
Router Router
Controller Controller
Gateway
133.215.0.1
133.215.1.1
133.215.2.1
HUB HUB