Yamaha DRCX - Manual (Page 48)

42
CHAPTER2 Ethernet Unit
■ Example 5
In this example, a controller in a remote location is centrally managed over the Internet.
Use of a firewall (defense mechanism to keep out intruders) is recommended to maintain
security.
Factory 2
Controller Controller
Internet
Factory 2
Factory 1
Router Router
Head office
Router Router
HUB HUB
PC PC
HUB HUB
Internet Internet
Internet
Head office router
PC
Factory 1 router
Controller 1
Factory 2 router
Controller 1
IP address
133.215.0.1
133.215.0.2
133.215.1.1
133.215.1.2
133.215.2.1
133.215.2.2
Subnet mask
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
255.255.255.0
Gateway
133.215.0.1
133.215.1.1
133.215.2.1
System setup example
* 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.