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Ip module, Connecting the network – Auto-Zone Control Systems IP Module Kit Installation Guide for the IP Module Kit Used with CommLink IV & 5 (Version 01N) User Manual

Page 16

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IP MODULE

16

Technical Guide

CommLink 5

Firewall

/

/Proxy Router

Ethernet Cable To Other
Nodes On Building LAN Or WAN

Ethernet Cable

Optional Direct
Computer Connection
To CommLink 5 Via Crossover
(Supplied with IP Module)

Personal Computer

Connecting the Network

Figure 17: Example Network Diagram of a Firewall or Proxy Confi guration

Proxy and Firewall Compatibility

Proxy and Firewall confi gurations

may become necessary

when the CommLink is connected to a LAN/WAN that is
protected by a commercially available Firewall, Proxy, or NAT
enabled router. Examples of these would include Cisco, NetGear,
LinkSys, or WatchGuard Technologies. Also, some ISPs provide
IP Address ranges that are already fi re-walled at the NOC or ISP
Head-End. Make sure that your IT Department or ISP can create
a mapped TCP port 39288 on your fi rewall/proxy to TCP port
39288 on the assigned IP Address of the CommLink.

Only with proper configuration of the Firewall/Proxy are
connections to the CommLink from outside of the local area
network going to be possible. Check that the Firewall/Proxy port
is not set to time out or reset after a specifi ed amount of time
when there is no traffi c from the remote PC.